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Deformation twinning in martensite affecting functional behavior of NiTi shape memory alloys
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SYSNO ASEP 0524589 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Deformation twinning in martensite affecting functional behavior of NiTi shape memory alloys Author(s) Šittner, Petr (UJF-V) ORCID, RID, SAI
Molnárová, O. (CZ)
Kadeřávek, Lukáš (UJF-V) ORCID
Tyc, O. (CZ)
Heller, Luděk (UJF-V) ORCIDNumber of authors 5 Article number 100506 Source Title Materialia. - : Elsevier - ISSN 2589-1529
Roč. 9, č. 3 (2020)Number of pages 15 s. Publication form Print - P Language eng - English Country DE - Germany Keywords deformation twinning ; functional fatigue ; martensitic transformation ; NiTi ; shape setting ; TWSME Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_013/0001794 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UJF-V - RVO:61389005 UT WOS 000537621200024 EID SCOPUS 85074282172 DOI 10.1016/j.mtla.2019.100506 Annotation Functional stress-strain temperature responses of superelastic NiTi wire in purposely designed thermomechanical tests in tension were evaluated and lattice defects created by the tensile deformation were analyzed by transmission electron microscopy in this work with the aim to investigate potential involvement of deformation twinning in oriented martensite in thermomechanical loads and its consequences for NiTi superelastic and shape memory technologies. It was found that: i) the deformation twinning in oriented martensite taking place upon tensile loading beyond the yield point gives rise to large and stable two way shape memory effect, ii) its activity during the reverse transformation under high stress enables shape setting of superelastic NiTi wires and iii) its activity during tensile superelastic cycling brings about unrecoverable strains and causes functional fatigue. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021 Electronic address https://doi.org/10.1016/j.mtla.2019.100506
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