Martensitic Transformation Development in the Rolled Ti-Ni Alloy: Varying of Temperature Parameters Depending on Grain Orientation

Abstract Inhomogeneity of martensitic transformations in the rolled alloy Ti-50.3%Ni was investigated by use of X-ray texture diffractonletry. For the first time temperature parameters of the reverse martensitic transformation B1YS+B2 were measured systematically for grains, corresponding by their orientation to 130 different points within a quadrant of the stereographic projection Depending on grain orientations, the temperature interval of the reverse martensitic transfortnatic,n has a width from 20 " to 4Oo. Obtained data correlate with known regularities of strain hardening distribution in textured materials. 1