Thermally induced reorientation and plastic deformation of B19' monoclinic martensite in nanocrystalline NiTi wires

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00570230" target="_blank" >RIV/68378271:_____/23:00570230 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.actamat.2022.118477" target="_blank" >https://doi.org/10.1016/j.actamat.2022.118477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2022.118477" target="_blank" >10.1016/j.actamat.2022.118477</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermally induced reorientation and plastic deformation of B19' monoclinic martensite in nanocrystalline NiTi wires

Popis výsledku v původním jazyce

Functional behavior of nanocrystalline NiTi shape memory wires having various austenitic microstructures was investigated by thermomechanical testing and TEM analysis of martensite microstructures in deformed wires. Three phenomena are reported and discussed in this work. First, martensitic NiTi wire heated under low applied stresses elongates several percent before it shortens during reverse martensitic transformation due to thermally induced martensite reorientation proceeding via motion of interfaces between (001) compound twin domains in the microstructure. Second, martensite stabilization by deformation is not caused by plastic deformation and lattice defects introduced by deformation but that it is due to change of martensite variant microstructures in polycrystal grains during the reorientation process. Finally, generation of unrecovered plastic strains and dislocation defects accompanies all martensitic transformation/reorientation/detwinning processes in NiTi.

Název v anglickém jazyce

Thermally induced reorientation and plastic deformation of B19' monoclinic martensite in nanocrystalline NiTi wires

Popis výsledku anglicky

Functional behavior of nanocrystalline NiTi shape memory wires having various austenitic microstructures was investigated by thermomechanical testing and TEM analysis of martensite microstructures in deformed wires. Three phenomena are reported and discussed in this work. First, martensitic NiTi wire heated under low applied stresses elongates several percent before it shortens during reverse martensitic transformation due to thermally induced martensite reorientation proceeding via motion of interfaces between (001) compound twin domains in the microstructure. Second, martensite stabilization by deformation is not caused by plastic deformation and lattice defects introduced by deformation but that it is due to change of martensite variant microstructures in polycrystal grains during the reorientation process. Finally, generation of unrecovered plastic strains and dislocation defects accompanies all martensitic transformation/reorientation/detwinning processes in NiTi.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Acta Materialia

ISSN

1359-6454

e-ISSN

1873-2453

Svazek periodika

242

Číslo periodika v rámci svazku

Jan

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

118477

Kód UT WoS článku

000930752100001

EID výsledku v databázi Scopus

2-s2.0-85141304123