Textures in the Superplastically Deformed Tin-Lead Eutectic Alloy

Abstract

Texture measurements and metallographic studies have been made at various strains in material deformed with initial values of strain-rate sensitivity (m) = 0.2, 0.3, and 0.7. Texture becomes more random with increasing strain in both phases, independent of the value of m. Curved. grain boundaries and grain growth are produced by deformation and scratch-offset studies demonstrate that boundary sliding is occurring. The texture measurements are discussed in terms of the sliding process itself and possible associated accommodation mechanisms, both of which lead to grain rotation and a slow reduction in texture with increasing strain.