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Young´s modulus of austenite and martensite phases in superelastic NiTi wires
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SYSNO ASEP 0432480 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Young´s modulus of austenite and martensite phases in superelastic NiTi wires Author(s) Šittner, Petr (FZU-D) RID, ORCID
Heller, Luděk (FZU-D) RID, ORCID
Pilch, Jan (FZU-D) RID
Curfs, C. (FR)
Alonso, T. (FR)
Favier, D. (FR)Source Title Journal of Materials Engineering and Performance. - : Springer - ISSN 1059-9495
Roč. 23, č. 7 (2014), s. 2303-2314Number of pages 12 s. Action International Conference on Shape Memory and Superelastic Technologies (SMST 2013) Event date 21.05.2013-24.05.2013 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords mechanical ; modeling and simulation ; non-ferrous metals Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GPP108/12/P111 GA ČR - Czech Science Foundation (CSF) GAP107/12/0800 GA ČR - Czech Science Foundation (CSF) GB14-36566G GA ČR - Czech Science Foundation (CSF) GA14-15264S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000339010700002 EID SCOPUS 84904791451 DOI 10.1007/s11665-014-0976-x Annotation Young s moduli of superelastic NiTi wires in austenite and stress-induced martensite states were evaluated by three different experimental methods (tensile tests, in situ synchrotron x-ray diffraction, and dynamic mechanical analysis) and estimated via theoretical calculation from elastic constants. The unusually low value of the Young s modulus of the martensite phase appearing in material property tables (<40 GPa) is generally ascribed in the literature to the fact that stress-driven martensitic transformation and/or twinning processes continue even beyond the transformation range and effectively decrease the value of the tangent modulus evaluated from macroscopic stress-strain curve. In this work, we claim that this low value is real in the sense that it corresponds to the appropriate combination of elastic constants of the B19´ martensite phase forming the polycrystalline wire. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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