Stress-induced transition from modulated 14M to non-modulated martensite in Ni?Mn?Ga allo

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00455296" target="_blank" >RIV/68378271:_____/15:00455296 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2015.02.028" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2015.02.028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2015.02.028" target="_blank" >10.1016/j.actamat.2015.02.028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stress-induced transition from modulated 14M to non-modulated martensite in Ni?Mn?Ga allo

Popis výsledku v původním jazyce

In situ straining of seven-layered (14M) martensite of Ni-Mn-Ga alloy was done with transmission electron microscope (TEM). During straining, the intermartensitic transition from 14M to non-modulated martensite (NM) occurred via motion of partial dislocation with a Burgers vector b = 1/6[1 (1) over bar 0] along the basal plane of 14M. High resolution TEM studies revealed that the moving partial at the end of the fault is actually a pair of partial dislocations leading to a two-layered fault. The fault is twin related to the adjoining five-layered basal plane forming complete seven-layered nanotwinned structure. Results demonstrate that the 14M to NM transition is a detwinning process of these nanotwins, and seems to confirm the nanotwin nature of the long-period stacking-order structure of 14M martensite. Lattice parameters of the average structure are affected by the regularity of the stacking sequence, i.e., by the volume fraction of the two-layer nanotwins and their distribution.

Název v anglickém jazyce

Stress-induced transition from modulated 14M to non-modulated martensite in Ni?Mn?Ga allo

Popis výsledku anglicky

In situ straining of seven-layered (14M) martensite of Ni-Mn-Ga alloy was done with transmission electron microscope (TEM). During straining, the intermartensitic transition from 14M to non-modulated martensite (NM) occurred via motion of partial dislocation with a Burgers vector b = 1/6[1 (1) over bar 0] along the basal plane of 14M. High resolution TEM studies revealed that the moving partial at the end of the fault is actually a pair of partial dislocations leading to a two-layered fault. The fault is twin related to the adjoining five-layered basal plane forming complete seven-layered nanotwinned structure. Results demonstrate that the 14M to NM transition is a detwinning process of these nanotwins, and seems to confirm the nanotwin nature of the long-period stacking-order structure of 14M martensite. Lattice parameters of the average structure are affected by the regularity of the stacking sequence, i.e., by the volume fraction of the two-layer nanotwins and their distribution.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

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

—

Svazek periodika

92

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

151-160

Kód UT WoS článku

000353753700015

EID výsledku v databázi Scopus

2-s2.0-84924762176