Structure and Properties of Ni47Mn42In11 Alloy after Severe Plastic Deformation

Abstract

This work has studied the effect of severe plastic deformation performed by high pressure torsion at 8 GPa and room temperature on the crystallographic structure, microhardness, and magnetic susceptibility of the ferromagnetic Ni₄₇Mn₄₂In₁₁ alloy. The size of structural elements decreases, whereas the fraction of a ductile fracture constituent and the microhardness increase with increasing true strain. Severe plastic deformation performed by high pressure torsion results in phase transformation. No modulated martensite is observed in the structure after deformation.