The crystal structure of thermally- and stress-induced Martensites in Ni₂MnGa single crystals

Abstract

Deformation behavior of Ni2MnGa single crystals uniaxially loaded in compression and tension along the 〈100〉β1 and 〈110〉β1 axes were investigated. It was shown that three successive stress-induced structural transitions may be observed for specimens tensed along the 〈100〉β1 or compressed along the 〈110〉β1 direction, while only one transition was stress-induced in compression along the 〈100〉β1 axis. The crystal structure of stress-induced and thermal martensite was identified and related reversible deformation values for different loading geometry were estimated.