FABRICATION OF A CU-AL-NI-MN SHAPE-MEMORY ALLOY

In the development of an optimized hot-rolling process for a Cu-Al-Ni- Mn alloy, the effects of the recrystallized and transformed texture on ductility and shape memory recovery were examined. The sheet texture of samples rolled in the beta-phase region (750-degrees-C) was charact erized by martensitic (128) poles along the normal direction and (0 0 18) pole inclined 60-degrees from the normal to the rolling direction. The samples rolled in the alpha + beta region (600-degrees-C) exhibit ed a slightly stronger but less symmetrical sheet texture. The shape m emory recovery is more or less isotropic in the rolling plane, relativ ely independent of the rolling conditions. However, an improved bendin g ductility of 9.5% was observed along the rolling direction in specim ens rolled at 750-degrees-C with a reduction per pass of 27%.