Kwinking as the plastic forming mechanism of B19′ NiTi martensite

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00575146

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Kwinking as the plastic forming mechanism of B19′ NiTi martensite

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Kwinking as the plastic forming mechanism of B19′ NiTi martensite

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA22-20181S" target="_blank" >GA22-20181S: Heterogenita makro- a mikro- deformací v NiTi slitině s tvarovou pamětí řízená transformačně-indukovanou plasticitou</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

1879-2154

Svazek periodika

168

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

29

Strana od-do

103697

Kód UT WoS článku

001048365300001

EID výsledku v databázi Scopus

2-s2.0-85164724736