Crystallographic Analysis and Mechanism of the Martensitic Transformation in the Heusler Alloy Ni47Mn42In11

Resumo

The lattice parameters of the matrix of the modulated martensite crystal of the Ni₄₇Mn₄₂In₁₁ alloy have been determined. Based on the phenomenological crystallographic theory of martensitic transformations, orientational relationships between the crystal lattices of the martensite matrix and the initial phase have been calculated, and the magnitude and the direction of the macroscopic shear, the habit plane, and the angle and the axis of rotation of the martensite plate have been determined. The mechanism of deformation upon the martensitic transformation has been established.