Laboratory of Materials Research and Testing (16)

Laboratory Chief
Stasė-Irena Lukošiūtė
Dr.

Medžiagų tyrimų ir bandymų laboratorija

MAIN RESEARCH AREAS OF THE LABORATORY:

  • reliability of power plant facilities: research of metal aging processes and degradation of properties due to the impact of operational factors;
  • development and research of multifunctional materials and composites;
  • Testing of materials, assessment and analysis of their qualitative indicators.

RELIABILITY OF POWER PLANT FACILITIES

The Laboratory carries out research aimed at the investigation of ageing processes of steel and special alloys that are used as constructional elements for power plants and at studying patterns of aging processes, solving issues concerning control of these processes and service life. Applying mechanical tests, X-ray Diffraction (XRD) and elemental composition analysis, as well as optic and scanning electron microscopy, structural and property changes of aged steel and non-ferrous alloys are studied. Experimental and numerical methods are used to predict operational reliability taking into account material ageing processes and other operational factors. The implementation of the work focuses on the investigation of fundamental physical and chemical phenomena affecting structure and properties of metals.

TESTING OF MATERIALS, ASSESSMENT AND ANALYSIS OF THEIR QUALITATIVE INDICATORS

Researchers of the Laboratory provide accredited Laboratory services, and perform material testing and assessment of their qualitative conformity. In 2015, the Laboratory was reaccredited to comply with the LST EN ISO/IEC 17025 standard. As a result of successful collaboration with economic entities, the Laboratory conducts research and provides consults on the quality issues of product manufacturing.

The Laboratory is accredited to carry out tests on:

  • Plastic pipes;
  • Plastics and cellular plastics;
  • Pre-insulated pipes;
  • Masonry mortars and plastering mortars.

Laboratory researchers constantly analyze demands of clients and expand the scope of services provided both in accredited and non – accredited field. They successfully participated in the comparative testing in Germany (Kunststoff-Institut Lüdenscheid and DRRR), a high level of excellence was approved in the field of plastics testing – the certificates were granted.

Accreditation and certificates

Laboratory of Materials Research and Testing accreditation and other certificates

Activity field:
Laboratory of Materials Research and Testing complies with the requirements of LST EN ISO/IEC 17025:2006 and is accredited to carry out test of building mortars, plastics pipes, pre-insulated pipes and refractory products.

Issuing authority:
Lithuanian National Accreditation Bureau


Reliability of power plant facilities: research of metal aging processes and degradation of properties due to the impact of operational factors

The Laboratory carries out research aimed at the investigation of ageing processes of steel and special alloys that are used as constructional elements for power plants and at studying patterns of aging processes, solving issues concerning control of these processes and service life. Applying mechanical tests, X-ray Diffraction (XRD) and elemental composition analysis, as well as optic and scanning electron microscopy, structural and property changes of aged steel and non-ferrous alloys are studied. Experimental and numerical methods are used to predict operational reliability taking into account material ageing processes and other operational factors. The implementation of the work focuses on the investigation of fundamental physical and chemical phenomena affecting structure and properties of metals. In this research direction, researchers of the Laboratory participated in long-term institutional scientific research and experimental development programs: “Scientific research of safety important processes taking place in nuclear and thermal nuclear facilities” and “Research of processes of nuclear power plant operation decommissioning, nuclear waste and spent nuclear fuel management and radiation impact analysis”. In 2017-2021, the program “Development of future energy technologies, research on their safety and reliability” is being implemented. Further research is in progress on investigating the aging processes of construction materials used in power plant equipment.

In 2016, the project Service life assessment model for new generation steel funded by the Research Council of Lithuania was completed. The objective of the work was to investigate developments of structural changes in steel under high temperature and their influence on the mechanical characteristics and degradation parameters. The structural changes occurring under the influence of temperature were determined investigating phase transformations in steel by assessing the evolution of steel carbides and changes in crystal lattice parameters. Phase changes of steel at 600-700 °C was investigated by means of XRD, scanning electron microscopy and EDX methods. Due to chemical elements diffusion during steel ageing evolution of carbides occurs which manifests by changes in size, element composition and crystalline lattice parameters. The analysis M23C6 carbide lattice changes during high temperature aging revealed that these changes are characteristic for estimation the extent of steel degradation, and thus may be recommended instead of other structural investigation methods.

Johnson-Mehl-Avrami kinetic equation was applied for creating a kinetic model for predicting changes of carbide crystallographic parameters as well as steel mechanical properties taking into account aging temperature and time. It was determined that predicted tensile and creep properties of thermally aged samples correlate well with experimental data. Research results revealed that the developed method rather well defines changes of mechanical properties at thermal ageing and could be relevant in estimating energy facilities ageing-related degradation and could be applied in forecasting their lifetime evaluation.

Fig. 1. Universal dynamic testing machine
Fig. 1. Universal dynamic testing machine

 

IAEA Atom for Peace logo

The Laboratory continued the research initiated by IAEA in 1998 related to degradation impact of hydrogen and hydrides on zirconium alloys. Analysis of Nuclear fuel Cladding Resistance to Hydride Cracking during Long-Term Storage coordinated by the International Atomic Energy Agency (IAEA) was completed in 2016. The objective of this work was to develop experimental procedures in order to assess conditions of hydride cracking in zirconium alloy fuel cladding – threshold stress intensity factor values and temperature limits, under which failure of fuel cladding may occur. By applying controlled hydriding, special construction samples were made of zirconium alloy fuel cladding, in which by changing stress levels, hydride cracking process under given temperatures was studied. The research is important for solving the issues of ensuring safe operation of nuclear power plants and assessing the resistance of fuel cladding to the hydride cracking during long-term storage of spent nuclear fuel.

In 2020, researchers of the Laboratory together with the team of the Laboratory of Nuclear Installation Safety continued the European Union financed programme Horizon 2020 project INcreasing Safety in NPPs by Covering gaps in Environmental Fatigue Assessment, INCEFA-PLUS. The objective of the project INCEFA-PLUS is to obtain new experimental data and submit recommendations by evaluating fatigue induced degradation in the nuclear reactor operating conditions. The impact of strain and stress mode, hold time, and the surface roughness on the fatigue life of austenitic steels will be investigated. Information about the possible fatigue degradation mechanisms will be obtained after conducting the microstructure and a fractographic research of the tested samples using optical and scanning electron microscopy, XRD and EDX analysis. Fatigue resistance tests are performed using a servohydraulic universal dynamic testing machine Instron (Model 8801, 100kN) and Wave Matrix software for creating test programs. The obtained experimental data were standardized and presented in the online fatigue strength database MatDB (JRC, Institute for Energy and Transport). The research will seek to fill in the current gaps in the existing data: create fatigue assessment procedures that would as much as possible comply with the real NPP operational conditions. During the project, a modified environmental fatigue assessment procedures will be created, which will allow a more accurate estimation of the mean strain, hold time and surface roughness influence. This will enable better management of nuclear facility components ensuring a long-term safe operation of the NPP.

Development and research of Multifunctional Materials and Composites

In 2016, a subsidy-funded scientific Research of impact of nano-sized modified admixtures on the structure of composite materials was completed. The work aims at investigating the structure of natural and synthetic layered nano silicates and optimizing the modification methodology; it also seeks to research the impact of modified silicates and complex nano-sized admixtures on the morphology of cement composite materials.
The influence of modification conditions on the structural changes of nano-sized admixtures (natural and synthetic nano-silicates) was identified, i.e. on the distance among tetrahedral layers, and on the nature of modifier and nano-silicates interaction. Modification methodology of nano-silicate as nano-filler for constructional materials was optimized; it can also be applied in implementing other analogous research and continuing activities in the field of new composites development with the assigned tasks.
The structural changes of the cement composition with nano-admixture – organically modified layered nano-silicate – depending on several factors: nano-silicate preparation, its concentration, and concentration of the used organic modifier were estimated. Dependence of morphological properties of cement compositions as well as mechanical and sorption properties from the additionally introduced nano-additive – the concentration of nano-sized silicon oxide particles, was investigated as well. Silicon oxide particles encourage the development of a cement composition with better mechanical properties. Obtained results revealed that complex usage of nano-sized additives – the modified silicate and silicon oxide – in the cement composition enables development a mechanically strong and water-resistant cement matrix, which may be used as a bounder in creating construction materials operated under increased moisture conditions.
Replacing part of the cement with alternative and environmentally friendly materials results in a composite material whose structural properties remain unchanged or even better.

Fig. 2. Structure model of modified layered silicate and SEM photograph
Fig. 2. Structure model of modified layered silicate and SEM photograph

 

In 2020 the researchers of the Laboratory together with participants from other laboratories have started to implement Priority 1 of the European Union Funds Investment Operational Program 2014–2020 “Promotion of Research, Experimental Development and Innovation” 01.2.2-CPVA-K-703 Measures “Centers of Excellence and Innovation and Promotion of Technology Transfer Centers ”project“ Execution of R&D activities of the Center of Excellence by creating and testing an innovative prototype for the production of gaseous biofuels”.
The project will address issues such as CO2 reduction (biomethane gas is used in an environmentally sustainable way), waste recycling and management (technology allows the diversification of the types of raw materials/waste used), efficient energy and fuel production from biomass/waste (three-generation: electricity, heat and valuable by-product is biomethane).
The researchers of the Laboratory will synthesize a new type of catalyst with a high specific surface area porous heterostructure, which will be used for CO2 / CO methanation and will increase the efficiency and economy of the biomethane formation process. The developed catalysts will be characterized by investigation of their surface morphology and structure properties using SEM / EDX, XRD, N2 physical sorption-desorption, thermal analysis, and other methods.

Fig.3. N2 sorption-desorption isotherms and SEM photographs of initial material and synthesized porous heterostructure
Fig.3. N2 sorption-desorption isotherms and SEM photographs of initial material and synthesized porous heterostructure

Identification of Plastics

The European Commission sets a target by the 2025 to reduce pollution related with plastics industry and to increase recycling of plastics waste and secondary usage in EU member states. The problem is relevant in Lithuania as well since there is lack of relevantly recycled waste, whereas producers lack good quality recycled raw material. The quality of plastic waste recycling is directly related with their relevant identification.
In 2016, laboratory researchers applying equipment of integrated science, studies and business centre “Santaka”, improved the methodology for plastics identification, which was used to identify polymer waste. Sorted plastic wastes are used as secondary raw material for many products. This not only protects nature and primary natural resources, but also enables everyone to economize.

Fig. 4. Test for leak tightness of plastic pipes
Fig. 4. Test for leak tightness of plastic pipes

Main applied research

The Laboratory conducts applied research under contracts with companies and organizations:

  • „Kauno arena“ – corrosion failure analysis of galvanized steel hot water supply pipelines and ethylene glycol supply pipelines used in air conditioning system” samples of steel galvanized pipes, used in a hot water plumbing system, were investigated. Analysis of corrosion failures was carried out, identifying main corrosion factors and presenting recommendations.
  • „Energijos skirstymo operatorius” – study of fusion of polyethylene pipe joints used in gas supply system.
  • „Lietuvos energijos gamyba“ – identifying the cause of high voltage power line failure.
  • „ORLEN Lietuva“ – examination of pipeline elements and remaining lifetime assessment.
  • The equipment of LEI National Open Access Scientific Research Centre for Future Energy Technologies was used for the research.

Publications

2021

Pitak I. [LEI], Denafas G. [LEI], Kalpokaitė Dičkuvienė R. [LEI]. Extraction of high calorific fraction from municipal solid waste during mechanical biological treatment process In: The 17th International Conference of Young Scientists on Energy and Natural Sciences Issues (CYSENI 2021) Kaunas, Lithuania, May 24-28, 2021. Kaunas: Lietuvos energetikos institutas, 2021, p. 44-54. ISSN 1822-7554.
Brostow W., Cañadas I., Faltynowicz H., Levinskas R. [LEI], Garcia J. R.. Fire resistance of materials In: Seventh Internacional Caucasian Symposium on Polymers and Advanced Materials. Tbilisi: Ivane Javakhishvili Tbilisi State University Press, 2021, 14, p. 1-1. ISBN 978-9941-491-09-2.
Bukauskytė J., Sundar H. R., Lukošiūtė I. [LEI], Baltušnikas A. [LEI], Jankauskaitė V.. Effect of compatibilizer on the structure and properties of polypropylene/nanoclay composites In: Industrial engineering 2021: international young researchers conference notification material, May 13, 2021, Kaunas, Lithuania. Kaunas: Kauno technologijos universitetas, 2021, p. 63-68. ISSN 2538-6727.
Yousef S., Kalpokaitė Dičkuvienė R. [LEI], Baltušnikas A. [LEI], Pitak I. [LEI], Lukošiūtė S. I. [LEI]. A new strategy for functionalization of char derived from pyrolysis of textile waste and its application as hybrid fillers (CNTs/char and graphene/ char) in cement industry In: Journal of Cleaner Production . Oxford: Elsevier, 2021, Vol. 314, 128058, p. 1-12. ISSN 0959-6526, eISSN 1879-1786.
Pitak I. [LEI], Denafas G. [LEI], Kriūkienė R. [LEI]. About solid recovered fuel: chemical characteristics and role in waste management system In: EYEC monograph: 9th European young engineers conference, [19-21 April 2021, Warsaw, Poland]. Warsaw: Faculty of Chemical and Process Engineering, Warsaw University of Technology Waryńskiego, 2021, Vol. 7, 11.5, p. 165. ISBN 978-83-936575-9-9.
Bendikienė R., Baltušnikas A. [LEI], Čiuplys A., Lukošiūtė I. [LEI], Juzėnas K., Kalpokaitė Dičkuvienė R. [LEI], Šertvytis R., Denafas J.. Utilization of Industrial Solar Cells’ Scrap as the Base Material to Form Coatings In: Waste and Biomass Valorization . Dordrecht: Springer, 2021, Vol. 12, p. 2757-2767. ISSN 1877-2641, eISSN 1877-265X.
Kavaliauskas Ž. [LEI], Kėželis R. [LEI], Milieška M. [LEI], Marcinauskas L. [LEI], Valinčius V. [LEI], Aikas M. [LEI], Uscila R. [LEI], Baltušnikas A. [LEI], Žunda A.. Influence of different plasma spraying methods on the physical properties of YSZ coatings In: Surfaces and Interfaces . Amsterdam: Elsevier, 2021, Vol. 24, 101120, p. 1-12. ISSN 2468-0230.
Bruchhausen M., Dundulis G. [LEI], McLennan A., Arrieta S., Austin T., n Cicero R., Chitty W. - J., Doremus L., Ernestova M., Grybėnas A. [LEI], Huotilainen C., Mann J., Motterchead K., Novotny R., Perosanz F. J., Platts N., le Roux J.-Ch., Spätig P., Celeizábal C. T., Twite M., Vankeerberghen M.. Characterization of Austenitic Stainless Steels with Regard to Environmentally Assisted Fatigue in Simulated Light Water Reactor Conditions In: Metals. Basel: MDPI, 2021, Vol. 11, Iss. 2, 307, p. 1-20. ISSN 2075-4701.
Kalpokaitė Dičkuvienė R. [LEI], Lukošiūtė S. I. [LEI], Baltušnikas A. [LEI], Čėsnienė J. [LEI]. Structural observation of cement paste modified with hydrophobic organoclay In: Construction and Building Materials. Oxford: Elsevier, 2021, Vol. 272, 121931, p. 1-10. ISSN 0950-0618.

2020

Pitak I. [LEI], Baltušnikas A. [LEI], Denafas G. [LEI]. Analysis of separated waste for the preparation of solid recovered fuels In: Conference proceedings 1 st International Conference Strategies toward Green Deal Implementation - Water and Raw Materials 14 – 16 December 2020 (Online). Cracow: Publishing House Mineral and Energy Economy Research Institute Polish Academy of Sciences, 2020, p. 124. ISBN 978-83-959215-5-1.
Janulionis R. [LEI], Dundulis G. [LEI], Grybėnas A. [LEI]. Numerical Research of Fracture Toughness of Aged Ferritic-Martensitic Steel In: Metals. Basel: MDPI, 2020, Vol. 10 (12), 1686, p. 1-13. ISSN 2075-4701.
Pitak I. [LEI], Denafas G. [LEI], Lukošiūtė I. [LEI]. Analysis MSW fraction after separation with goal to have solid recovery fuel In: Book of abstracts: Linnaeus ECO-TECH '20 12th International conference on establishment of cooperation between companies and institutions in the Nordic countries, the Baltic Sea region and the world. Kalmar: Linnaeus University, 2020, p. 1-1. ISBN 978-91-89081-03-1.
Dundulis G. [LEI], Grybėnas A. [LEI], Bruchhausen M., Cicero R., Mottershead K., Huotilainen C., Le-Rouxs J.-Ch., Vankeerberghen M.. INCEFA-PLUS project: review of the test programme and main results In: Proceedings 29th International Conference on Metallurgy and Materials Brno, Czech Republic, EU, May 20 - 22, 2020. Brno: 2020, p. 410-415. Scopus. ISSN 2694-9296 ISBN 978-80-87294-97-0.
Makarevičius V. [LEI], Baltušnikas A. [LEI], Lukošiūtė I. [LEI], Kriūkienė R. [LEI], Grybėnas A. [LEI]. Effect of thermal aging on structural changes in P91 and P5 heat resistant steels In: Proceedings 29th International Conference on Metallurgy and Materials, Brno, Czech Republic, May 20 - 22, 2020. Brno: 2020, p. 567-572. SCOPUS . ISSN 2694-9296 ISBN 978-80-87294-97-0.
Yousef S., Subadra S. P., Griškevičius P., Varnagiris Š. [LEI], Milčius D. [LEI], Makarevičius V. [LEI]. Superhydrophilic functionalized graphene/fiberglass/epoxy laminates with high mechanical, impact and thermal performance and treated by plasma In: Polymer Testing. Oxford: Elsevier, 2020, Vol. 90, 106701, p. 1-11. ISSN 0142-9418, eISSN 1973-2348.
Yousef S., Tatariants M., Bendikienė R., Kriūkienė R. [LEI], Denafas G.. A new industrial technology for closing the loop of full-size wastemotherboards using chemical-ultrasonic-mechanical treatment In: Process Safety and Environmental Protection. Amsterdam: Elsevier, 2020, Vol. 140, p. 367-379. ISSN 0957-5820.
Subadra S. P., Yousef S., Griškevičius P., Makarevičius V. [LEI]. High-performance fiberglass/epoxy reinforced by functionalized CNTs for vehicle applications with less fuel consumption and greenhouse gas emissions In: Polymer Testing. Oxford: Elsevier, 2020, Vol. 86, 106480, p. 1-10. ISSN 0142-9418.
Yousef S., Tatariants M., Tichonovas M., Kliučininkas L., Lukošiūtė S. I. [LEI], Yan L.. Sustainable green technology for recovery of cotton fibers and polyester from textile waste In: Journal of Cleaner Production. Oxford: Elsevier, 2020, Vol. 254, 120078, p. 1-11. ISSN 0959-6526.
Vaičiukynienė D., Mikelionienė A., Baltušnikas A. [LEI], Kantautas A., Radzevičius A.. Removal of ammonium ion from aqueous solutions by using unmodified and H2O2-modified zeolitic waste In: Scientific Reports. London: Scientific Reports, 2020, Vol. 10, 352, p. 1-11. ISSN 2045-2322.
Kalyk F., Stankevičiūtė A., Budrytė G., Gaidamavičienė G., Žalga A., Kriūkienė R. [LEI], Kavaliauskas Ž. [LEI], Leszczynska M., Abakevičienė B.. Comparative study of samarium-doped ceria nanopowders synthesized by various chemical synthesis routes In: Ceramics International . Oxford: Elsevier, 2020, Vol. 46, Iss. 15, p. 24385-24394. ISSN 0272-8842, eISSN 1873-3956.

2019

Yousef S., Hamdy M., Tatariants M., Tučkutė S. [LEI], El-Abden S. Z., Kliučininkas L., Baltušnikas A. [LEI]. Sustainable industrial technology for recovery of cellulose from banknote production waste and reprocessing into cellulose nanocrystals In: Resources, Conservation and Recycling. Amsterdam: Elsevier, 2019, Vol. 149, p. 510-520. ISSN 0921-3449, eISSN 1879-0658.
Sarwar Z., Yousef S., Tatariants M., Krugly E., Čiužas D., Danilovas P. P., Baltušnikas A. [LEI], Martuzevičius D.. Fibrous PEBA-graphene nanocomposite filaments and membranes fabricated by extrusion and additive manufacturing In: European Polymer Journal. Oxford: Elsevier, 2019, Vol. 121, 109317, p. 1-12. ISSN 0014-3057, eISSN 1873-1945.
Kavaliauskas Ž. [LEI], Marcinauskas L. [LEI], Milieška M. [LEI], Valinčius V. [LEI], Baltušnikas A. [LEI], Žunda A.. Effect of copper content on the properties of graphite-copper composites formed using the plasma spray process In: Surface & Coatings Technology. Elsevier, 2019, Vol. 364, p. 398-405. ISSN 0257-8972.
Kalpokaitė Dičkuvienė R. [LEI], Baltušnikas A. [LEI], Levinskas R. [LEI], Čėsnienė J. [LEI]. Incinerator residual ash – Metakaolin blended cements: Effect on cement hydration and properties In: Construction and Building Materials. Elsevier, 2019, Vol. 206, p. 297-306. ISSN 0950-0618.
Yousef S., Tatariants M., Tichonovas M., Makarevičius V. [LEI]. Sustainable technology for mass production of Ag nanoparticles and Al microparticles from damaged solar cell wafers In: Waste Management. Elsevier, 2019, Vol. 98, p. 126-134. ISSN 0956-053X.
Yousef S., Tatariants M., Denafas J., Makarevičius V. [LEI], Lukošiūtė S. I. [LEI], Kruopienė J.. Sustainable industrial technology for recovery of Al nanocrystals, Si microparticles and Ag from solar cell wafer production waste In: Solar Energy Materials and Solar Cells. Amsterdam, Netherlands: Elsevier, 2019, Vol. 191, p. 493-501. ISSN 0927-0248, eISSN 1879-3398.
Baltušnikas A. [LEI], Grybėnas A. [LEI], Kriūkienė R. [LEI], Lukošiūtė I. [LEI], Makarevičius V. [LEI]. Evolution of Crystallographic Structure of M23C6 Carbide Under Thermal Aging of P91 Steel In: Journal of Materials Engineering and Performance. Springer, 2019, Vol. 28, No. 3, p. 1480-1490. ISSN 1059-9495.
Grinkevičiūtė P., Leknickė G, Lodienė G., Kriūkienė R. [LEI]. Effects of Irrigation Solutions on Root Canal Dentin In: International Journal of Applied Science and Technology. 2019, Vol. 9, No. 4, p. 44-50. ISSN 2221-0997.

2018

Kalpokaitė Dičkuvienė R. [LEI], Lukošiūtė I. [LEI], Brinkienė K. [LEI], Striūgas N. [LEI], Baltušnikas A. [LEI], Lukauskaitė R., Čėsnienė J. [LEI]. Utilization of sewage sludge-biomass gasification residue in cement-based materials: effect of pozzolant type In: Environmental technology. Ablington, England: Taylor & Francis Group, 2018, Vol. 39, No. 22, p. 2937-2950. ISSN 0959-3330.
Tatariants M., Yousef S., Skapas M., Juškėnas R., Makarevičius V. [LEI], Lukošiūtė S. I. [LEI], Denafas G.. Industrial technology for mass production of SnO2 nanoparticles and PbO2 microcube/microcross structures from electronic waste In: Journal of Cleaner Production. Oxford, England: Elsevier, 2018, Vol. 203, p. 498-510. ISSN 0959-6526.
Mumladze T., Yousef S., Tatariants M., Kriūkienė R. [LEI], Makarevičius V. [LEI], Lukošiūtė S. I. [LEI], Bendikienė R., Denafas G.. Sustainable approach to recycling of multilayer flexible packaging using switchable hydrophilicity solvents In: Green Chemistry. Cambridge, England: rsc.li/green-chem, 2018, Vol. 20, p. 3604-3618. ISSN 1463-9262.
Janulionis R. [LEI], Dundulis G. [LEI], Kriūkienė R. [LEI], Grybėnas A. [LEI]. Numerical prediction of mechanical properties of zirconium alloy with hydrides using finite element method In: Energetika. Vilnius: Lietuvos mokslų akademija, 2018, T. 64, Nr. 1, p. 43-51. ISSN 0235-7208, eISSN 1822-8836.
Varnagiris Š. [LEI], Donelienė J., Tučkutė S. [LEI], Čėsnienė J. [LEI], Lelis M. [LEI], Milčius D. [LEI]. Expanded polystyrene foam formed from polystyrene beads coated with a nanocrystalline SiO2 film and the analysis of its moisture adsorption and resistance to mechanical stress In: Polymer-Plastics Technology and Engineering . Philadelphia, USA: Taylor&Francis, 2018, Vol. 57, Iss. 13, p. 1296-1302. ISSN 0360-2559, eISSN 1525-6111.
Janulionis R. [LEI], Dundulis G. [LEI], Grybėnas A. [LEI]. Numerical Investigation of Hydrogen Influence on Stress Intensity Factor of Zirconium Alloy In: Proceedings of 23rd International Conference “MECHANIKA 2018”. Druskininkai, 18 gegužės 2018 . Kaunas: Kauno technologijos universitetas, 2018, p. 58-61. ISSN 1822-2951.
Yousef S., Mumladze T., Tatariants M., Kriūkienė R. [LEI], Makarevičius V. [LEI], Bendikienė R., Denafas G.. Cleaner and profitable industrial technology for full recovery of metallic and non-metallic fraction of waste pharmaceutical blisters using switchable h ydrophilicity solve nts In: Journal of Cleaner Production. Oxford, England: Elsevier, 2018, Vol. 197, p. 379-392. ISSN 0959-6526.
Yousef S., Tatariants M., Makarevičius V. [LEI], Lukošiūtė S. I. [LEI], Bendikienė R., Denafas G.. A strategy for synthesis of copper nanoparticles from recovered metal of waste printed circuit boards In: Journal of Cleaner Production. Oxfordas: Elsevier, 2018, Vol. 185, p. 653-664. ISSN 0959-6526.
Levinskas R. [LEI], Kasiulis E.. Lietuvos mokslas – ateities energetikai In: Investuok. Vilnius: UAB „Leidybos studija“, 2018, Nr. 3, p. 54-55. ISSN 1822-6779.
Levinskas R. [LEI], Lukošiūtė I. [LEI], Baltušnikas A. [LEI], Kuoga A., Luobikienė A., Rodriguez J., Cañadas I., Brostow W.. Modified xonotlite-type calcium silicate hydrate slabs for fire doors In: Journal of fire sciences. Sage, 2018, Vol. 36, Iss. 2, p. 83-96. ISSN 0734-9041.
Čėsnienė J. [LEI], Baltušnikas A. [LEI], Lukošiūtė I. [LEI], Brinkienė K. [LEI], Kalpokaitė Dičkuvienė R. [LEI]. Influence of organoclay structural characteristics on properties and hydration of cement pastes In: Construction and building materials. Oxford, England: Elsevier, 2018, Vol. 166, p. 59-71. ISSN 0950-0618.
Coleman Ch. E., Markelov V. A., Roth M., Makarevičius V. [LEI], He Z., Chakravartty J. K., Alvarez-Holston A. M., Ali L., Ramanathan L., Inozemtsev V.. Is Spent Nuclear Fuel Immune from Delayed Hydride Cracking during Dry Storage? An IAEA Coordinated Research Project In: Zirconium in the nuclear industry: 18th international symposium. JAV: ASTM International, 2018, p. 1224-1249. ISSN 1050-7558 ISBN 978-0-8031-7641-6.

2017

Kavaliauskas Ž. [LEI], Marcinauskas L. [LEI], Aikas M. [LEI], Valinčius V. [LEI], Milieška M. [LEI], Baltušnikas A. [LEI]. Effect of carbon powder thermal activation on characteristics of supercapacitor electrodes In: Journal of Electrostatics. 2017, Vol. 90, p. 61-66. ISSN 0304-3886.
Sokol D., Klemkaitė-Ramanauskė K., Khunsky A., Baltakys K., Beganskienė A., Baltušnikas A. [LEI], Pinkas J., Kareiva A.. Reconstruction Effects on Surface Properties of Co/Mg/Al Layered Double Hydroxide In: Materials science (MEDŽIAGOTYRA). 2017, Vol. 23, No. 2, p. 144-149. ISSN 1392-1320.
Lukauskaitė R., Černašėjus O., Škamat J., Asadauskas S., Ručinskienė A., Kalpokaitė Dičkuvienė R. [LEI], Višniakov N.. Increasing the wear resistance of Al-Mg components using thermal spray coatings In: Materials and technology. 2017, Vol. 51, No. 4, p. 673-678. ISSN 1580-2949.
Grybėnas A. [LEI], Makarevičius V. [LEI], Baltušnikas A. [LEI], Lukošiūtė S. I. [LEI], Kriūkienė R. [LEI]. Correlation between structural changes of M23C6 carbide and mechanical behaviour of P91 steel after thermal aging In: Materials Science and Engineering: A. 2017, Vol. 696, p. 453-460. ISSN 0921-5093.
Lukauskaitė R., Černašėjus O., Škamat J., Zabulionis D., Stonys R., Kalpokaitė Dičkuvienė R. [LEI], Antonivič V.. The effect of Al-Mg substrate preparation on the adhesion strength of plasma sprayed Ni-Al coatings In: Surface & Coatings Technology. 2017, Vol. 316, p. 93-103. ISSN 0257-8972.
Padgurskas J., Kreivaitis R., Rukuiža R., Michailov V., Agafii V., Kriūkienė R. [LEI], Baltušnikas A. [LEI]. Tribological properties of coatings obtained by electro-spark alloying C45 steel surfaces In: Surface & Coatings Technology. 2017, Vol. 311, p. 90-97. ISSN 0257-8972.
Dundulis G. [LEI], Janulionis R. [LEI], Grybėnas A. [LEI], Makarevičius V. [LEI], Dundulis R.. Numerical and experimental investigation of low cycle fatigue behaviour in P91 steel In: Engineering Failure Analysis. 2017, Vol. 79, p. 285-295. ISSN 1350-6307.

2016

Baltušnikas A. [LEI], Grybėnas A. [LEI], Kriūkienė R. [LEI], Makarevičius V. [LEI], Makštys A. [LEI]. Structural Characterization of Montmorillonite Intercalated with N-cetylpyridinium Chloride and Methyl Benzyl Di-octadecyl Ammonium Chloride In: Book of abstracts of the 7th Baltic Conference on Silicate Materials BaltSilica 2016. 26-27 May. . Kaunas: Kauno technologijos universitetas, 2016, p. 1-1. ISSN 2243-6057.
Dundulis G. [LEI], Janulionis R. [LEI], Makarevičius V. [LEI], Grybėnas A. [LEI]. Fracture toughness numerical modelling of the martensitic chromium stell In: 25th Anniversary International Conference on Metallurgy and Materials. Conference proceedings May 25th - 27th 2016 Hotel Voronez I, Brno, Czech Republic. Ostrava: Tanger Ltd, 2016, p. 592-597. ISBN 978-80-87294-67-3.
Kandrotaitė-Janutienė R., Baltušnikas A. [LEI]. Investigation of plastic behavior of alloyed steel deformed during martesitic transformation In: Strength of Materials. Niujorkas: Springer, 2016, Vol. 48, No. 5, p. 696-703. ISSN 0039-2316.
Baltušnikas A. [LEI], Lukošiūtė I. [LEI], Makarevičius V. [LEI], Kriūkienė R. [LEI], Grybėnas A. [LEI]. Influence of thermal exposure on structural changes of M23C6 carbide in P91 steel In: Journal of Materials Engineering and Performance. Springer, 2016, Vol. 25, No. 5, p. 1945-1951. ISSN 1059-9495.
Skrockienė V., Žukienė K., Jankauskaitė V., Baltušnikas A. [LEI], Petraitienė S.. Properties of mechanically recycled polycaprolactonebased thermoplastic polyuretane/polycaprolactone blends and their nanocomposites In: Journal of Elastomers&Plastics. Kaunas: Vytauto Didžiojo universitetas, 2016, Vol. 48, No. 3, p. 266-286. ISSN 0095-2443.
Brinkienė K. [LEI], Čėsnienė J. [LEI], Kalpokaitė Dičkuvienė R. [LEI], Lukošiūtė I. [LEI]. Performance evaluation of refractory composite coatings in potassium rich environment In: Materials science (Medžagotyra). Kaunas: Kauno technologijos universitetas, 2016, Vol. 22, No. 3, p. 451-457. ISSN 1392-1320.
Baltušnikas A. [LEI], Lukošiūtė I. [LEI], Makarevičius V. [LEI], Kriūkienė R. [LEI], Levinskas R. [LEI], Grybėnas A. [LEI]. Energetikoje naudojamų plienų senėjimo vertinimas pagal struktūros pokyčius In: Energetika. Vilnius: Lietuvos mokslų akademija, 2016, T. 62, Nr. 3, p. 155-170. ISSN 0235-7208.
Tamošiūnas A. [LEI], Valatkevičius P. [LEI], Valinčius V. [LEI], Levinskas R. [LEI]. Biomass conversion to hydrogen-rich synthesis fuels using water steam plasma In: Comptes Rendus Chimie. Prancūzija, Paryžius: Elsevier, 2016, Vol. 19, p. 433-440. ISSN 1631-0748.

2015

Janulionis R. [LEI], Dundulis G. [LEI], Grybėnas A. [LEI]. Numerical simulation of high temperature fatigue test of the welded steel P91 In: 23rd Conference on Structural Mechanics in Reactor Technology Manchester (SMIRT23). United Kingdom: 2015, p. 1-8..
Dundulis G. [LEI], Janulionis R. [LEI], Grybėnas A. [LEI]. Deterministic-probabilistic structural integrity analysis of the gas transmission pipelines In: Proceedings of the 48th ESReDA Seminar, May 28-29, 2015. Wroclaw, Poland: 2015, p. 1-8..
Makarevičius V. [LEI], Baltušnikas A. [LEI], Lukošiūtė I. [LEI], Kriūkienė R. [LEI], Grybėnas A. [LEI]. Transformation kinetic M23C6 carbide lattice parameters in ferritic-martensitic P91 steel during thermal ageing In: 24th International conference on Metallurgy and Materials. Conference proceedings June 3-5, 2015. Brno Czech Republic: TANGER, 2015, p. 773-778. ISBN 978-80-87294-62-8. .
Grybėnas A. [LEI], Kriūkienė R. [LEI], Makarevičius V. [LEI]. Evaluation of conditions for hydrogen induced degradation of zirconium alloys during fuel operation and storage In: Vienna: International Atomic Energy Agency. Vienna: IAEA, 2015, p. 1-72. ISSN 1011-4289 ISBN 978–92–0-110715-2.
Tamošiūnas A. [LEI], Valatkevičius P. [LEI], Grigaitienė V. [LEI], Valinčius V. [LEI], Levinskas R. [LEI]. Biomass conversion to hydrogen-rich synthesis fuels using water steam plasma In: The sixth international renewable energy congress. Sousse-Tunisia: Tunisas, 2015, p. 1-7..
Kalpokaitė Dičkuvienė R. [LEI], Lukošiūtė I. [LEI], Brinkienė K. [LEI], Baltušnikas A. [LEI], Čėsnienė J. [LEI]. Properties of waste catalyst-cement mortars: impact of organoclay type In: Fresenius Environmental Bulletin. Germany: Parlar Scientific Publications, 2015, Vol. 24, No. 10b, p. 3460-3466. ISSN 1018-4619.
Janutienė R. K., Dičkuvienė R. [LEI]. External stress effects on microstructure and transformation plasticity of hot work tool steel during quenching In: Strength of Materials. New York: Springer, 2015, Vol. 47, No. 5, p. 728-739. ISSN 0039-2316.
Brinkienė K. [LEI], Čėsnienė J. [LEI], Lukošiūtė I. [LEI], Baltušnikas A. [LEI], Kalpokaitė Dičkuvienė R. [LEI]. Effect of organoclay addition on durability related properties of cement pastes In: Fresenius Environmental Bulletin. Germany: 2015, Vol. 24, Iss. 8a, p. 2624-2629. ISSN 1018-4619.
Baltušnikas A. [LEI], Šiaučiūnas R., Lukošiūtė S. I. [LEI], Baltakys K., Eisinas A., Kriūkienė R. [LEI]. Crystal structure refinement of synthetic pure gyrolite In: Materials Science (Medžiagotyra). Kaunas: Kauno technologijos universitetas, 2015, Vol. 21, No. 1, p. 111-116. ISSN 1392-1320.
Ambroza P., Baltušnikas A. [LEI], Kavaliauskienė L., Pilkaitė T.. Steel surface strenghtening by overlay welding and plastic deformation In: Mechanika. Kaunas: Kauno technologijos universitetas, 2015, Vol. 21, Nr. 3, p. 240-244. ISSN 1392-1207, eISSN 2029-6983 .
Kalpokaitė Dičkuvienė R. [LEI], Lukošiūtė I. [LEI], Čėsnienė J. [LEI], Brinkienė K. [LEI], Baltušnikas A. [LEI]. Cement substitution by organoclay – The role of organoclay type In: Cement & Concrete Composites : Elsevier. 2015, Vol. 62, p. 90-96. ISSN 0958-9465, eISSN 1873-393X.

2014

Kėželis R. [LEI], Grigaitienė V. [LEI], Levinskas R. [LEI], Brinkienė K. [LEI]. The employment of a high density plasma jet for the investigation of thermal protection materials In: Physica scripta. 2014, Vol. 2014, No. T161, Article ID: 014069, ISSN 0031-8949, eISSN 1402-4896.
Esteves L. P., Lukošiūtė I. [LEI], Čėsnienė J. [LEI]. Hydration of cement with superabsorbent polymers In: Journal of thermal analysis and calorimetry. 2014, Vol. 118, No. 2, p. 1385-1393. ISSN 1388-6150.

2013

Dundulis G. [LEI], Grybėnas A. [LEI], Karalevičius R. [LEI], Makarevičius V. [LEI], Rimkevičius S. [LEI], Ušpuras E. [LEI]. Dynamic analytical and experimental research of shock absorber to safeguard the nuclear fuel assemblies In: Nuclear engineering and design. 2013, Vol. 260, p. 155-164. ISSN 0029-5493.

2010

Makarevičius V. [LEI], Grybėnas A. [LEI], Kriūkienė R. [LEI]. Investigation of resistance of nuclear fuel cladding to hydride cracking In: Mechanika. 2010, Vol. 85, No. 5, p. 25-30. ISSN 1392-1207, eISSN 2029-6983.
Kim Y. S., Makarevičius V. [LEI]. Effect of unloading on crack growth rate of Zr–2.5Nb tubes In: Journal of Nuclear Materials. 2010, Vol. 405, Iss. 1, p. 28-32. ISSN 0022-3115.
Lelis M. [LEI], Milčius D. [LEI], Wirth E., Hålenius U., Eriksson L., Jansson K., Kadir K., Ruan J., Sato T., Yokosawa T., Noréus D.. A mechanically switchable metal–insulator transition in Mg2NiH4 discovers a strain sensitive, nanoscale modulated resistivity connected to a stacking fault In: Journal of Alloys and Compounds. 2010, Vol. 496, Iss. 1-2, p. 81-86. ISSN 0925-8388.
Brinkienė K. [LEI], Kėželis R. [LEI], Mėčius V. [LEI], Čėsnienė J. [LEI]. Nanostructured bioceramic coatings obtained by plasma spray technique In: European cells and materials. 2010, Vol. 20, No. 3, p. 289. ISSN 1473-2262.
Antonovič V., Pundienė I., Stonys R., Čėsnienė J. [LEI], et al. A review of the possible applications of nanotechnology in refractory concrete In: Journal of civil engineering and management. Vilnius: Technika, 2010, Vol. 16, No. 4, p. 595-602. ISSN 1392-3730.

Projects

International projects

Horizon 2020

1

INCEFA-PLUS delivers new experimental data and new guidelines for assessment of environmental fatigue damage to ensure safe operation of European nuclear power plants. Austenitic sMore

Seventh Framework Programme (FP7)

1

Fibre Reinforced Cement (FRC) is a durable, fire and corrosion resistant material widely used in the construction industry. Coupled with the low cost of Portland cement, these propertMore

2

Main objective of the Researcher night 2011 is to enhancing public recognition of researchers and their work, through bringing public and researchers closer to one other, tackling theMore

IAEA

1

Components for nuclear reactors are made from zirconium alloys because they have a low thermal neutron capture cross-section, high resistance to corrosion in high temperature water anMore

2

The major goal of the this CRP is to develop experimental procedures for the reproducible measurements of delayed hydride cracking velocity of zirconium alloy cladding. In this procesMore

COST

1
COST actions logo

COST Action MP0701 is concerned with polymers, which are reinforced with nano particles. Polymer Nanocomposites are blends of different polymer matrices with nanometre sized functionaMore

2
COST actions logo

The main objective of the Action is to develop an innovative 'integrated toolbox' of predictive methods/models and targeted invasive and non-invasive measurement techniques, improvingMore

3
COST actions logo

The main objective of the Action is to develop materials for improved wear resistance of artificial joints and novel low wearing designs. For this purpose, the biotribology of materiaMore

4
COST actions logo

The main objective of the COST Action 525 was to understand the role played by grain boundaries in controlling the manufacture, microstructure and properties of electronic ceramics. CMore

Other international projects

1

Researchers from the National Institute of Materials Science at the National Academy of Sciences of Ukraine (UNMA MPI) and the Lithuanian Energy Institute (LEI) have been working to cMore

Personnel

Name, surname Position Office phone. e-mail
Stasė-Irena Lukošiūtė Head (Senior research associate) 137-LK +37037401908 Stase.Irena.Lukosiute@lei.lt
Arūnas Baltušnikas Senior research associate 136-LK +37037401906 Arunas.Baltusnikas@lei.lt
Jūratė Čėsnienė Senior research associate 311-LK +37037401912 Jurate.Cesniene@lei.lt
Gintaras Denafas Chief research associate 314-LK Gintaras.Denafas@lei.lt
Regina Kalpokaitė Dičkuvienė Senior research associate 316-LK +37037401984 Regina.Kalpokaite-Dickuviene@lei.lt
Vilija Grigalevičienė Expert 136-LK +37037401906 Vilija.Grigaleviciene@lei.lt
Albertas Grybėnas Senior research associate 136-LK +37037401906 Albertas.Grybenas@lei.lt
Virginijus Kazlauskas Technician 029-LK +37037401915
Rita Kriūkienė Research associate 134-LK +37037401907 Rita.Kriukiene@lei.lt
Rimantas Levinskas Senior research associate 208-AK +37037401804 Rimantas.Levinskas@lei.lt
Vidas Makarevičius Senior research associate 135-LK +37037401907 Vidas.Makarevicius@lei.lt
Algis Makštys QA Chemist 315-LK +37037401910 algis.1206@gmail.com
Inna Pitak PhD student 314-LK Inna.Pitak@lei.lt

Services

Research on the mechanical properties of materials
Determination of tensile, compression, bending, ring stiffness, ring flexibility and other special properties. Determination of the characteristics of small metal samples in static or low-cycle loads conditions.
Investigations of the fluidity properties of plastic materials
Determination of mass fluidity and volume fluidity of plastic materials.
Studies on the softening properties of plastic materials
Determination of the softening temperature of polymers and composites.
Conditioning of materials and samples
Materials testing in a controlled environment.
Investigations of aggressive environmental impact on plastic materials
Determination of resistance of plastic materials to aggressive environment.
Metal composition analysis
Determination of elemental composition of ferrous and non-ferrous metals.
Chemical analysis
Quantitative and qualitative determination of chemical elements.
Determination of thermodynamic characteristics of materials
Characterization of thermodynamic characteristics, specific heat, melting, decomposition, crystallization, glass transition temperature, oxidation, reduction, etc. of polymers, metals, fillers, composite materials, organic materials.
Determination of the surface area and pore size of solids
Specific surface area determination: BET, Langmiuro, STSA, DFT and BJH methods. Microporous Surface Analysis: NLDFT, QSDFT, Monte-Carlo, t-plot, alpha, MP, DR and DA methods.
Investigation of corrosion and electrochemical processes
Investigation of corrosion processes of metals, corrosion kinetics, effectiveness evaluation of corrosion inhibitors and protective coatings, evaluation of electrochemical parameters (corrosion current, current density, polarization resistance, kinetics of electrodynamic processes, diffusion, mass transfer, etc.).
Material hardness measurement
Measurement of hardness and microhardness by methods of Vickers, Brinell and Rockwell.
Electronic microscopy
Surface morphology and structure analysis of materials using electronic microscope, determination of surface elemental composition.