Plastic Anisotropy in Aluminium - Effect of Texture and Microstructure

Abstract

The effects of crystallographic texture and deformation microstructure on the flow stress anisotropy in aluminium are reviewed. The texture is measured by neutron diffraction and the textural contribution to the anisotropy is determined by model calculations. It was found that texture can have very large effects on the anisotropy. However, for most experimental conditions, texture effects alone cannot explain the observed anisotropy. In those cases the non texture part of the anisotropy is caused by microstructural effects, and the relation between development of macroscopically oriented microbands and the "microstructural anisotropy " is discussed. Finally the effects of various materials and processing parameters on the flow stress anisotropy, the texture, the microstructure and on the relative importance of texture microstructure effects on the anisotropy is discussed.