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Thermally induced reorientation and plastic deformation of B19' monoclinic martensite in nanocrystalline NiTi wires
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SYSNO ASEP 0570230 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermally induced reorientation and plastic deformation of B19' monoclinic martensite in nanocrystalline NiTi wires Author(s) Iaparova, Elizaveta (FZU-D) ORCID
Heller, Luděk (FZU-D) RID, ORCID
Tyc, Ondřej (FZU-D) ORCID
Šittner, Petr (FZU-D) RID, ORCIDNumber of authors 4 Article number 118477 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 242, Jan (2023)Number of pages 19 s. Language eng - English Country GB - United Kingdom Keywords NiTi ; shape memory alloys ; martensitic transformation Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA20-14114S GA ČR - Czech Science Foundation (CSF) GA22-20181S GA ČR - Czech Science Foundation (CSF) EF18_053/0016627 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzechNanoLab - 90110 - Vysoké učení technické v Brně
CzechNanoLab II - 90251 - Vysoké učení technické v Brně / Středoevropský technologický institutMethod of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000930752100001 EID SCOPUS 85141304123 DOI 10.1016/j.actamat.2022.118477 Annotation Functional behavior of nanocrystalline NiTi shape memory wires having various austenitic microstructures was investigated by thermomechanical testing and TEM analysis of martensite microstructures in deformed wires. Three phenomena are reported and discussed in this work. First, martensitic NiTi wire heated under low applied stresses elongates several percent before it shortens during reverse martensitic transformation due to thermally induced martensite reorientation proceeding via motion of interfaces between (001) compound twin domains in the microstructure. Second, martensite stabilization by deformation is not caused by plastic deformation and lattice defects introduced by deformation but that it is due to change of martensite variant microstructures in polycrystal grains during the reorientation process. Finally, generation of unrecovered plastic strains and dislocation defects accompanies all martensitic transformation/reorientation/detwinning processes in NiTi. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://doi.org/10.1016/j.actamat.2022.118477
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