0604183 - ÚT 2025 RIV US eng A - Abstrakt
Seiner, Hanuš - Sedlák, Petr - Frost, Miroslav - Šittner, Petr
Kwink Patterns in Plastically Formed NiTi Martensite.
SMST 2024: Extended Abstracts from the International Conference on Shape Memory and Superelastic Technologies. ASM International, 2024. s. 29-30, č. článku smst2024p0029..
[SMST 2024. 06.05.2024-10.05.2024, Cascais]
Grant CEP: GA MŠMT(CZ) EH22_008/0004591; GA ČR(CZ) GA24-10334S
Institucionální podpora: RVO:61388998 ; RVO:68378271
Klíčová slova: kwink patterns * martensite * nickel-titanium alloys * plastic forming
Obor OECD: Materials engineering; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Web výsledku:
https://dl.asminternational.org/shape-memory/proceedings-abstract/SMST2024/84840/29/31806DOI: https://doi.org/10.31399/asm.cp.smst2024p0029

Nickel-titanium B19’ martensite is a strongly plastically anisotropic material with only one available slip system, which is the [100](001)M slip. Despite this, B19’ martensite polycrystals can be homogeneously plastically formed, reaching up to very high plastic strains. The absence of other slip systems is compensated by plastic twinning, in particular by the frequently appearing irreversible (20-1)M twins. However, these twins act on the same (010)M lattice plane as the plastic slip, and thus, do not seem to be a very suitable complement to the slip in terms of the Von Mises criterion. In fact, exactly the same strains as by the (20-1)M twins can be achieved also by the [100](001)M slip itself, and thus, a question arises, whether they can be understood as plastic twins in the conventional sense.
Trvalý link: https://hdl.handle.net/11104/0361561