Investigation of the effect of cube texture on formability of face center cubic sheet metals

M.A. BERTINETTI; P.A. TURNER; J.W. SIGNORELLI

San Luis

Congreso; ENIEF 2008 -; 2008

Cube texture component is inevitably present in face center cubic sheet metal. Such preferred orientation leads to anisotropic properties which affect the sheet formability. In this research, the effect of the cube texture on forming-limit strains is studied using a rate-dependent viscoplastic law in conjunction with the Marciniak-Kuczynski approach. The forming limit diagram and yield locus are determined for several spreading of grain orientations around the ideal {100} <001> component. The spreading respect to the ideal orientation is taken assuming a uniform distribution with a standard deviation or cut-off angle from 0 degrees to 15 degrees. The trend of the predicted limit strains shows that the main differences in the forming limit strains have a correlation with the sharpness of the yield locus near equi-biaxial stretching path, and also with the texture evolution and subsequent selected slip systems predicted by each model.