A Comparison of the Observed and Predicted Deformation Textures in Cubic Metals

Abstract

A theoretical analysis of the textures developed in bcc metals deforming by pencil glide is briefly reviewed and the results compared with experimental results. The pencil-glide case was chosen because it is possible to make an unambiguous theoretical analysis. The main features of the results are identical to those for bcc metals deforming by {110} 〈111〉 slip, or by interchanging directions of compression and extension, for fcc metals deforming by {111} 〈110〉 slip. Upper- and lower-bound theories are both presented and it is found that the upper-bound theory is closer to the experimental facts. There remain, however, some important deviations between theory and experiment and the reasons for these are discussed. In considering one possibility, an imposed-strain theory of surface textures is presented.