Martensitic Transformation in a High Textured Cu-Al-Ni Shape Memory Alloy

C. SOBRERO; A. ROATTA; R. E. BOLMARO

Universidad Tecnológica Metropolitana, Santiago, Chile

Congreso; 8º Congreso Internacional de Metalurgia y Materiales – CONAMET/SAM-2008; 2008

The formation of the 18R1 martensite in copper based shape memory alloys 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).In the current work experimental texture measurements for both phases and simulations have been carried out to establish the effect of the different activated variants in the transformation texture. The high temperature textures were measured with an on purpose designed stage and the samples were cycled a few times to evaluate texture degradation.