Kwinking as the plastic forming mechanism of B19′ NiTi martensite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F23%3A00575146" target="_blank" >RIV/61388998:_____/23:00575146 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/23:00575146
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0749641923001833" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0749641923001833</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijplas.2023.103697" target="_blank" >10.1016/j.ijplas.2023.103697</a>
Alternative languages
Result language
angličtina
Original language name
Kwinking as the plastic forming mechanism of B19′ NiTi martensite
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA22-20181S" target="_blank" >GA22-20181S: Tailoring strain heterogeneity on macro- and micro-scales in NiTi shape memory alloys by transformation-induced plasticity</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Plasticity
ISSN
0749-6419
e-ISSN
1879-2154
Volume of the periodical
168
Issue of the periodical within the volume
September
Country of publishing house
GB - UNITED KINGDOM
Number of pages
29
Pages from-to
103697
UT code for WoS article
001048365300001
EID of the result in the Scopus database
2-s2.0-85164724736