Abstract
On the basis of the Continuum Mechanics of Textured Polycrystals (CMTP), yield loci of several ideal textures appearing in pure aluminum and its alloy sheets were calculated. The shape variations of yield loci in the rolling plane and influence of the orientation scatter width on them were all analyzed. Then, forming limit diagrams (FLDs) of the ideal textures were predicted by means of an incorporation of the anisotropic CMTP yield function into Marciniak and Kuczynski’s (M-K) model. Anisotropy of forming limit diagrams for different textures was analyzed. The distinct corresponding relationship between yield loci and FLDs for textured aluminum sheets is indicated. Reasonable agreement is observed between the predicted and measured FLDs for pure aluminum and A5083 alloy sheets. An optimum combination of different texture components that lead to reducing in-plane plastic anisotropy and improving the formability of aluminum sheets was also discussed.
