Pseudoelastic deformation and size effects during in situ transmission electron microscopy tensile testing of NiTi

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00387724" target="_blank" >RIV/68081723:_____/12:00387724 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2012.01.043" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2012.01.043</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2012.01.043" target="_blank" >10.1016/j.actamat.2012.01.043</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pseudoelastic deformation and size effects during in situ transmission electron microscopy tensile testing of NiTi

Popis výsledku v původním jazyce

The stress-induced B2-B19' transformation in aged 51 at.% NiTi was investigated using in situ straining transmission electron microscopy (TEM). Increased applied strain along [1 1 0](B2) transforms B2 into plates containing B19' variants that are relatedby a (1 1 0)(B2) compound twin plane. This atypical twin plane is explained by relaxing the invariant plane constraint in the crystallographic theory of martensite (CTM) to an invariant line constraint. The relaxation is rationalized from the thin foilgeometry. The relaxed CTM approach, coupled with conditions to maximize transformation strain along the loading axis and minimize elastic energy, predicts the observed twin interface, diffraction patterns, and interface with the B2 austenite. These results demonstrate subtleties in interpreting thin foil TEM results regarding martensitic transformations, and translating those results to bulk response. (C) 2012 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

Název v anglickém jazyce

Pseudoelastic deformation and size effects during in situ transmission electron microscopy tensile testing of NiTi

Popis výsledku anglicky

The stress-induced B2-B19' transformation in aged 51 at.% NiTi was investigated using in situ straining transmission electron microscopy (TEM). Increased applied strain along [1 1 0](B2) transforms B2 into plates containing B19' variants that are relatedby a (1 1 0)(B2) compound twin plane. This atypical twin plane is explained by relaxing the invariant plane constraint in the crystallographic theory of martensite (CTM) to an invariant line constraint. The relaxation is rationalized from the thin foilgeometry. The relaxed CTM approach, coupled with conditions to maximize transformation strain along the loading axis and minimize elastic energy, predicts the observed twin interface, diffraction patterns, and interface with the B2 austenite. These results demonstrate subtleties in interpreting thin foil TEM results regarding martensitic transformations, and translating those results to bulk response. (C) 2012 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

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

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Svazek periodika

60

Číslo periodika v rámci svazku

6-7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

2770-2777

Kód UT WoS článku

000303952000030

EID výsledku v databázi Scopus

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