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Beyond the strain recoverability of martensitic transformation in NiTi
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SYSNO ASEP 0517366 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Beyond the strain recoverability of martensitic transformation in NiTi Author(s) Heller, Luděk (FZU-D) RID, ORCID
Šittner, Petr (FZU-D) RID, ORCID
Sedlák, Petr (UT-L) RID, ORCID
Seiner, Hanuš (UT-L) RID, ORCID
Tyc, Ondřej (FZU-D) ORCID
Kadeřávek, Lukáš (FZU-D) ORCID
Sedmák, P. (FR)
Vronka, Marek (FZU-D)Number of authors 8 Source Title International Journal of Plasticity. - : Elsevier - ISSN 0749-6419
Roč. 116, May (2019), s. 232-264Number of pages 33 s. Language eng - English Country GB - United Kingdom Keywords shape-memory alloys ; plastic-deformation ; NiTi ; mechanics modelling ; TRIP ; tensile testing Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Subject RIV - cooperation Institute of Thermomechanics - Metallurgy R&D Projects GA16-20264S GA ČR - Czech Science Foundation (CSF) GA18-03834S GA ČR - Czech Science Foundation (CSF) LM2015088 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015087 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 ; UT-L - RVO:61388998 UT WOS 000463303400013 EID SCOPUS 85062169868 DOI 10.1016/j.ijplas.2019.01.007 Annotation Tensile deformation of a medical grade NiTi wire was investigated in a wide temperature range from −100 °C to 450 °C. Supplemental in-situ electrical resistance, synchrotron x-ray diffraction, digital image correlation and ex-situ TEM methods were employed to characterize deformation/transformation processes acting at high temperatures and stresses. Conventional superelastic deformation due to stress induced martensitic transformation taking place around room temperature becomes gradually accompanied by dislocation slip in the temperature range 30–80 °C. With further increasing temperature, stress induced martensitic transformation still proceeds in localized manner but the length of the forward stress plateau increases, volume fraction of the martensite phase at the end of forward stress plateau decreases, unrecovered strain increases and {114} austenite twins appeared in the microstructure of deformed wires. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://doi.org/10.1016/j.ijplas.2019.01.007
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