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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

  • Czech description

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