A textural study of variant selection in a Beta1®Beta1'martensitic transformation in a Cu-Al-Ni shape memory alloy

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

Porto de Galinha

Congreso; 18º CONGRESSO CBECIMAT; 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 (b1) to the martensitic one (b1’).