Thermodynamical model of NiTi shape memory alloys including plastic deformation mechanisms

0564469 - ÚT 2023 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Sedlák, Petr - Frost, Miroslav - Seiner, Hanuš - Heller, Luděk - Šittner, Petr
Thermodynamical model of NiTi shape memory alloys including plastic deformation mechanisms.
Conference Proceedings from International Conference on Shape Memory and Superelastic Technologies, SMST 2022. Materials Park, Ohio: ASM International, 2022, s. 65-66. ISBN 978-171385538-5.
[International Conference on Shape Memory and Superelastic Technologies 2022, SMST 2022. Carlsbad (US), 16.05.2022-20.05.2022]
Grant CEP: GA ČR(CZ) GA22-20181S; GA MŠMT(CZ) LTAUSA18199
Institucionální podpora: RVO:61388998 ; RVO:68378271
Klíčová slova: constitutive model * martensitic phase transformation * plasticity * NiTi
Obor OECD: Materials engineering; Materials engineering (FZU-D)
https://dl.asminternational.org/shape-memory/proceedings/SMST%202022/84291/65/18983

This contribution presents an extension of a well-established constitutive model for NiTi covering both reversible (elastic, martensitic transformation, martensite reorientation) and irreversible (plastic) deformation mechanisms. Besides the inclusion of mechanisms of plastic deformation in both austenitic and martensitic phases in an independent manner, the model also newly captures more complex coupled phenomena of martensitic transformation and plastic deformation, such as transformation-induced plasticity, stabilization of martensite by plastic deformation, or plasticity-induced microstrain heterogeneity leading to functional fatigue.
Trvalý link: https://hdl.handle.net/11104/0336180