X-Ray Diffraction Study of the Martensite Structure of the Ni47Mn42In11 Alloy

Resumo

X-ray diffraction analysis was used to study the martensite structure of the Ni₄₇Mn₄₂In₁₁ alloy. This study shows that the martensitic transformation in the alloy occurs with the formation of modulated martensite. Using a new cell prototype, this work determined the parameters of basic cell of the modulated martensite structure and the modulation direction and lattice-modulation period. Orientation relationships between the high-temperature austenite and martensite structures were also determined. A comparative analysis of the new and previous results was performed. The new basic cell indicates the martensite crystal symmetry.