ANISOTROPY OF THE SHAPE-MEMORY EFFECT IN TENSION OF COLD-ROLLED 50.8-TI 49.2-NI (AT.PERCENT) SHEET

The texture of a cold-rolled and heat-treated 50.8 Ti 49.2 Ni (at.%) s heet has been determined and designated as 1110{110BAR!p. According t o the crystallography of the martensitic transformation in TiNi this t exture would result in a maximum planar anisotropy of the tensile shap e memory strain. This anisotropy is confirmed by thermo-mechanical tes ts. Furthermore, the anisotropy of the permanent strain during thermal cycling and of the strain associated with the formation of the R phas e have been measured and explained. The knowledge of these orientation dependences can be useful regarding specific requirements of certain applications.