TEM analysis of permanent lattice defects created by forward and reverse martensitic transformations proceeding under stress in nanocrystalline NiTi wire

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00637957" target="_blank" >RIV/68378271:_____/25:00637957 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0368730" target="_blank" >https://hdl.handle.net/11104/0368730</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2025.121346" target="_blank" >10.1016/j.actamat.2025.121346</a>

Jazyk výsledku

angličtina

Název v původním jazyce

TEM analysis of permanent lattice defects created by forward and reverse martensitic transformations proceeding under stress in nanocrystalline NiTi wire

Popis výsledku v původním jazyce

The origin of cyclic instability of stress-strain-temperature responses of NiTi shape memory alloy (SMA) in cyclic thermomechanical loads (functional fatigue) represents one of the unsolved problems in the SMA field. In particular, the mechanism by which incremental plastic strains and permanent lattice defects are generated during thermomechanical cycling is not known. To reveal it, we evaluated recoverable strain, plastic strain and permanent lattice defects in austenite created by forward and reverse martensitic transformations (MT) proceeding under wide range of external tensile stress by closed loop thermal cycling under constant stress and transmission electron microscopy (TEM) analysis of permanent lattice defects in austenite consisting of slip dislocations and deformation bands, variation of crystal lattice orientation and elastic strain field in grains.

Název v anglickém jazyce

TEM analysis of permanent lattice defects created by forward and reverse martensitic transformations proceeding under stress in nanocrystalline NiTi wire

Popis výsledku anglicky

The origin of cyclic instability of stress-strain-temperature responses of NiTi shape memory alloy (SMA) in cyclic thermomechanical loads (functional fatigue) represents one of the unsolved problems in the SMA field. In particular, the mechanism by which incremental plastic strains and permanent lattice defects are generated during thermomechanical cycling is not known. To reveal it, we evaluated recoverable strain, plastic strain and permanent lattice defects in austenite created by forward and reverse martensitic transformations (MT) proceeding under wide range of external tensile stress by closed loop thermal cycling under constant stress and transmission electron microscopy (TEM) analysis of permanent lattice defects in austenite consisting of slip dislocations and deformation bands, variation of crystal lattice orientation and elastic strain field in grains.

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

2025

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

297

Číslo periodika v rámci svazku

Sept

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

33

Strana od-do

121346

Kód UT WoS článku

001545814300003

EID výsledku v databázi Scopus

2-s2.0-105012317225