MARTENSITIC-TRANSFORMATION DEVELOPMENT IN THE ROLLED TI-NI ALLOY - VARYING OF TEMPERATURE PARAMETERS DEPENDING ON GRAIN-ORIENTATION

Inhomogeneity of martensitic transformations in the rolled alloy Ti-50 .3%Ni was investigated by use of X-ray texture diffractometry. For the first time temperature parameters of the reverse martensitic transfor mation B19-->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 tempera ture interval of the reverse martensitic transformation has a width fr om 20 degrees to 40 degrees. Obtained data correlate with known regula rities of strain hardening distribution in textured materials.