Characterization of the variant selection occurring during the α→β→α phase transformations of a cold rolled titanium sheet

Abstract

The fact that a cold rolling prior to an α→ β→ α transformation sequence causes the sharpening of the inherited α textures is analyzed. A restitution method is used to evaluate the intermediate β textures which allowed us to discuss the occurrence of variant selection in the β→ α transformation. It appears that cold rolling prior to the α→ β transformation makes the high temperature β texture sharper, with a density reinforcement around the {112}/{11-2}<111> components and further the variant selection occurring in the β→ α phase transformation becomes stronger. The local texture analysis obtained by EBSD leads to the same results and is used to characterize the variant selection occurring in the β→ α transformation.