Increase of twinning stress in single crystalline Ni-Mn-Ga micropillars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00585951" target="_blank" >RIV/68378271:_____/24:00585951 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10473047

Výsledek na webu

<a href="https://hdl.handle.net/11104/0353584" target="_blank" >https://hdl.handle.net/11104/0353584</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtla.2023.101988" target="_blank" >10.1016/j.mtla.2023.101988</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Increase of twinning stress in single crystalline Ni-Mn-Ga micropillars

Popis výsledku v původním jazyce

We have investigated the effect of characteristic size decrease on the magneto-mechanical properties of Ni-Mn-Ga single crystalline 10M martensite, using micropillars prepared by focused-ion-beam milling. Following the electro-chemical surface treatment, the twinning stress in a focused-ion-beam milled micropillar with a characteristic size of about 17 µm was reduced from 17 MPa to below 2 MPa, allowing the magnetically induced reorientation of twin variants. We found that twinning stress universally increases with the decrease of characteristic size. In combination with the data for bulk material, our results suggest a power law dependence of twinning stress on characteristic size, with an exponent of -0.5 for both Type I and Type II single twin boundaries. Extrapolation of the fit suggests the characteristic size limit for magnetically induced reorientation to be 30 µm and 2 µm for Type I and Type II twin boundaries, respectively.

Název v anglickém jazyce

Increase of twinning stress in single crystalline Ni-Mn-Ga micropillars

Popis výsledku anglicky

We have investigated the effect of characteristic size decrease on the magneto-mechanical properties of Ni-Mn-Ga single crystalline 10M martensite, using micropillars prepared by focused-ion-beam milling. Following the electro-chemical surface treatment, the twinning stress in a focused-ion-beam milled micropillar with a characteristic size of about 17 µm was reduced from 17 MPa to below 2 MPa, allowing the magnetically induced reorientation of twin variants. We found that twinning stress universally increases with the decrease of characteristic size. In combination with the data for bulk material, our results suggest a power law dependence of twinning stress on characteristic size, with an exponent of -0.5 for both Type I and Type II single twin boundaries. Extrapolation of the fit suggests the characteristic size limit for magnetically induced reorientation to be 30 µm and 2 µm for Type I and Type II twin boundaries, respectively.

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

2024

Kód důvěrnosti údajů

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

Název periodika

Materialia

ISSN

2589-1529

e-ISSN

2589-1529

Svazek periodika

33

Číslo periodika v rámci svazku

Mar

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

101988

Kód UT WoS článku

001140795200001

EID výsledku v databázi Scopus

2-s2.0-85179763593