A Textural Study of Variant Selection in Martensitic Transformation of a Cu-Al-No Shape Memory Alloy

C. SOBRERO, A. ROATTA, J. MALARRÍA, R. BOLMARO.

Porto de Galinhas-PE-Brasil

Congreso; 18 CBECiMat, Congresso Brasileiro de Engenharia e Ciência dos Materiais,; 2008

We have developed a special device for measuring textures at medium temperatures in an X-ray goniometer. It has been used for the first time to study the formation of the 18R1 martensite in copper-based shape memory alloys. It occurs spontaneously during cooling by the localized formation of four self-accommodating variants in a plate group. Each of the six plate groups have four self-accommodating variants, resulting on twenty four transformation variants from de parent phase (FCC) to the martensitic one (18R1).