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In Situ Characterization of the Elasticity and Stress-Induced Phase Transformation of NiTi Shape-Memory Alloy
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SYSNO ASEP 0499131 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title In Situ Characterization of the Elasticity and Stress-Induced Phase Transformation of NiTi Shape-Memory Alloy Author(s) Grabec, Tomáš (UJF-V) ORCID
Zoubková, K. (CZ)
Stoklasová, Pavla (UT-L) RID, ORCID
Ševčík, Martin (UT-L) ORCID
Sedlák, Petr (UT-L) RID, ORCID
Janovská, Michaela (UT-L) RID, ORCID
Seiner, Hanuš (UT-L) RID, ORCID
Landa, Michal (UT-L) RIDNumber of authors 7 Source Title Acta Physica Polonica A. - : Polska Akademia Nauk - ISSN 0587-4246
Roč. 134, č. 3 (2018), s. 811-814Number of pages 4 s. Publication form Print - P Action 14th International Symposium on Physics of Materials (ISPMA) Event date 10.09.2017 - 15.09.2017 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country PL - Poland Keywords polycrystalline shape memory alloy ; NiTi ; Ritz-Rayleigh based method Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Nuclear related engineering Subject RIV - cooperation Institute of Thermomechanics - Acoustics R&D Projects EF16_013/0001794 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GB14-36566G GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 ; UJF-V - RVO:61389005 UT WOS 000453257500046 EID SCOPUS 85058969857 DOI 10.12693/APhysPolA.134.811 Annotation In the presented paper, a sample of polycrystalline shape-memory NiTi alloy is studied under compression up to 5% by the means of laser-excited and laser-detected ultrasound waves. The evolution of a propagation velocity of the surface acoustic wave is measured in situ during mechanical loading. An inverse method based on the Ritz-Rayleigh numerical approach is then used to obtain the development of elastic properties of the sample. This process enables an analysis of the evolution of stress-induced transformation from the austenitic to the martensitic phase with the possibility to describe several stages of such transformation, i.e., the transformation to full R-phase, its reorientation causing strong anisotropy of the polycrystalline sample, and consecutive gradual transition to martensite. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2019
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