Mechanical stabilization of martensite: comparison of Ni-Mn-Ga and Cu-Ni-Al shape memory single crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00499590" target="_blank" >RIV/61388998:_____/18:00499590 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00499590 RIV/68407700:21340/18:00325127

Výsledek na webu

<a href="http://dx.doi.org/10.12693/APhysPolA.134.627" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.134.627</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.134.627" target="_blank" >10.12693/APhysPolA.134.627</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical stabilization of martensite: comparison of Ni-Mn-Ga and Cu-Ni-Al shape memory single crystals

Popis výsledku v původním jazyce

Newly developed formalism, regarding 2H modulated Cu-Ni-Al system as non-magnetic equivalent of Ni-Mn-Ga 10M modulated martensite provides the way to compare behaviour of these two shape memory alloys. Here we study the mechanical stabilization by mechanical stress in the single crystals of Ni50.7Mn27.7Ga21.6 (at.%) and Ni46Mn24Ga22Co4Cu4 exhibiting 10M and non-modulated martensite structures, respectively, and for comparison in Cu69.4Ni3.4Al27.2 2H martensite. The resulting shift of reverse transformation temperature was almost 50 K in the Cu-Ni-Al 2H martensite and about 6 K in Ni-Mn-Ga non-modulated martensite. In contrast, the shift was <1 K in 10M Ni-Mn-Ga martensite. From the comparison it follows that the negligible stabilization in modulated 10M Ni-Mn-Ga can be due to its deep twinning hierarchy and very high mobility of twin boundaries.

Název v anglickém jazyce

Mechanical stabilization of martensite: comparison of Ni-Mn-Ga and Cu-Ni-Al shape memory single crystals

Popis výsledku anglicky

Newly developed formalism, regarding 2H modulated Cu-Ni-Al system as non-magnetic equivalent of Ni-Mn-Ga 10M modulated martensite provides the way to compare behaviour of these two shape memory alloys. Here we study the mechanical stabilization by mechanical stress in the single crystals of Ni50.7Mn27.7Ga21.6 (at.%) and Ni46Mn24Ga22Co4Cu4 exhibiting 10M and non-modulated martensite structures, respectively, and for comparison in Cu69.4Ni3.4Al27.2 2H martensite. The resulting shift of reverse transformation temperature was almost 50 K in the Cu-Ni-Al 2H martensite and about 6 K in Ni-Mn-Ga non-modulated martensite. In contrast, the shift was <1 K in 10M Ni-Mn-Ga martensite. From the comparison it follows that the negligible stabilization in modulated 10M Ni-Mn-Ga can be due to its deep twinning hierarchy and very high mobility of twin boundaries.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Physica Polonica. A

ISSN

0587-4246

e-ISSN

—

Svazek periodika

134

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

4

Strana od-do

627-630

Kód UT WoS článku

000453257500004

EID výsledku v databázi Scopus

2-s2.0-85058964986