Temperature dependence of elastic properties in austenite and martensite of Ni-Mn-Ga epitaxial films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00489353" target="_blank" >RIV/61388998:_____/18:00489353 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00489353

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2017.12.011" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2017.12.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2017.12.011" target="_blank" >10.1016/j.actamat.2017.12.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature dependence of elastic properties in austenite and martensite of Ni-Mn-Ga epitaxial films

Popis výsledku v původním jazyce

Using surface acoustic waves (SAW) the elastic properties of 500 nm thick epitaxial off-stoichiometric Ni-Mn-Ga films prepared by sputtering on MgO substrate were determined in a broad temperature range both in austenite and martensite and across the martensitic transformation. At room temperature the films were in non-modulated martensite with tweed-like microstructure. Structural and magnetic studies proved that the martensitic structure can be considered homogenous on the scale of surface waves owing to the fine twinning. Measured angular dependence of SAW velocities indicated that the averaged in-plane tetragonal structure can be used for the calculation of elastic coefficients in martensite. The phase velocity of SAW showed an anomaly around the phase transition temperature due to changes of the shear elastic coefficients, c'and c(44). During cooling there was a gradual softening of c' in austenite.

Název v anglickém jazyce

Temperature dependence of elastic properties in austenite and martensite of Ni-Mn-Ga epitaxial films

Popis výsledku anglicky

Using surface acoustic waves (SAW) the elastic properties of 500 nm thick epitaxial off-stoichiometric Ni-Mn-Ga films prepared by sputtering on MgO substrate were determined in a broad temperature range both in austenite and martensite and across the martensitic transformation. At room temperature the films were in non-modulated martensite with tweed-like microstructure. Structural and magnetic studies proved that the martensitic structure can be considered homogenous on the scale of surface waves owing to the fine twinning. Measured angular dependence of SAW velocities indicated that the averaged in-plane tetragonal structure can be used for the calculation of elastic coefficients in martensite. The phase velocity of SAW showed an anomaly around the phase transition temperature due to changes of the shear elastic coefficients, c'and c(44). During cooling there was a gradual softening of c' in austenite.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA17-00062S" target="_blank" >GA17-00062S: Vysvětlení modulovaných struktur Heuslerových slitin</a><br>

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 Materialia

ISSN

1359-6454

e-ISSN

—

Svazek periodika

145

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

298-305

Kód UT WoS článku

000424726200029

EID výsledku v databázi Scopus

2-s2.0-85039449391