Rolling Textures in BCC Metals: A Biaxial Stress Texture Theory and Experiments

Mechanical properties, such as the tensile anisotropy, of bcc metal sheets are significantly influenced by their rolling textures, so it is important to investigate the texture formation mechanisms in the metals in order to control their textures. A biaxial stress texture theory, which can be used to reveal the texture formation mechanism in bcc metal sheets by analyzing the grain rotation during rolling, -is put forward in this work. With the theory, rolling textures and deformation microstructures in W sheets are studied and it is demonstrated that two stable texture components, namely, (001)[110] and (111)[1 (1) over bar0] textures, are formed in the W sheet rolled to a large reduction (92.4%). The two textures can be converted between each other under the action of conjugate slips and cross slip, leading them to be the stable orientations in the W sheets. The deformation microstructures in the W sheets are investigated by trace analysis in a pole figure based on the biaxial stress texture theory, which shows a consistency between the predictions of the theory and experimental results.