Počet záznamů: 1
Kwinking as the plastic forming mechanism of B19′ NiTi martensite
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SYSNO ASEP 0575146 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Kwinking as the plastic forming mechanism of B19′ NiTi martensite Tvůrce(i) Seiner, Hanuš (UT-L) RID, ORCID
Sedlák, Petr (UT-L) RID, ORCID
Frost, Miroslav (UT-L) RID, ORCID
Šittner, Petr (FZU-D) RID, ORCIDCelkový počet autorů 4 Číslo článku 103697 Zdroj.dok. International Journal of Plasticity. - : Elsevier - ISSN 0749-6419
Roč. 168, September (2023)Poč.str. 29 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova shape memory alloy (SMA) ; martensitic phase transformation ; plastic forming ; pattern formation ; anisotropic dislocation slip ; crystal plasticity Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP GA22-20181S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UT-L - RVO:61388998 ; FZU-D - RVO:68378271 UT WOS 001048365300001 EID SCOPUS 85164724736 DOI 10.1016/j.ijplas.2023.103697 Anotace Irreversible plastic forming of B19′ martensite of the NiTi shape memory alloy is discussed within the framework of continuum mechanics. It is suggested that the main mechanism arises from coupling between martensite reorientation and coordinated [100](001)M dislocation slip. A heuristic model is proposed, showing that the (201)M deformation-twin bands, commonly observed in experiments, can be interpreted as a combination of dislocation-mediated kink bands, appearing due to strong plastic anisotropy, and reversible twinning of martensite. We introduce a term ’kwinking’ for this combination of reversible twinning and irreversible plastic kinking The model is subsequently formulated using the tools of nonlinear elasticity theory of martensite and crystal plasticity, introducing ’kwink interfaces’ as planar, kinematically compatible interfaces between two differently plastically slipped variants of martensite. It is shown that the (201)M kwink bands may be understood as resulting from energy minimization, and that their nucleation and growth and their pairing with (100)M twins into specific patterns enables low-energy plastic forming of NiTi martensite. We conclude that kwinking makes plastic deformation of B19′ martensite in polycrystalline NiTi possible despite only one slip system being available. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/abs/pii/S0749641923001833
Počet záznamů: 1