Recoverability of large strains and deformation twinning in martensite during tensile deformation of NiTi shape memory alloy polycrystals

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00511881" target="_blank" >RIV/61389005:_____/19:00511881 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/19:00511540 RIV/68407700:21340/19:00337222
Result on the web
<a href="https://doi.org/10.1016/j.actamat.2019.09.012" target="_blank" >https://doi.org/10.1016/j.actamat.2019.09.012</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.actamat.2019.09.012" target="_blank" >10.1016/j.actamat.2019.09.012</a>

Result language
angličtina
Original language name
Recoverability of large strains and deformation twinning in martensite during tensile deformation of NiTi shape memory alloy polycrystals
Original language description
It is concluded that the plastic deformation of NiTi wires is initiated by deformation twinning in oriented martensite, accompanied by dislocation slip in austenite and/or martensite in extent depending on the test temperature and total strain. The deformation twinning is found to play an ambiguous role in NiTi deformation. When it proceeds at low temperatures (T <= 20 degrees C) beyond the yield point, it raises recoverable strain up to 13%, while at high temperatures (T >= 50 degrees C) when it proceeds already within the plateau range as intermediate step of the stress induced B2=>B19'=>B2(T) martensitic transformation, it restricts the recoverability of transformation strains. The repeated deformation twinning in oriented martensite enables low temperature deformation of NiTi wires with specific microstructure up to similar to 50% strain and causes severe microstructure refinement during the mechanical and thermomechanical processing of NiTi.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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