Formation Process of Texture in AZ80 Alloy during High Temperature Plane Strain Compression Deformation

摘要

Formation process of textures in AZ80 is investigated on polycrystal specimens with different initial textures by plane strain compression deformation at 673 K and 723 K with strain rates between 5.0 × 10~(-4)s~(-1) and 5.0 × 10~(-2)s~(-1). Three kinds of specimens were taken out from the extruded bars with < 1010 > (direction of the extrusion) fiber texture by changing the geometrical relationship with the extrusion direction. In the case of the specimen having < 1010 > parallel to the compression direction before deformation, the initial fiber texture gradually transformed into several orientations with increasing strain at 723K with a strain rate of 5.0 × 10~(-2)s~(-1). <0001> oriented grains, which was not seen in the pole figures before deformation appeared after the deformation up to -1.0 in true strain. The other two kinds of specimens have compression directions perpendicular to < 1010 > direction. The textures after deformation of these two kinds of specimens also consisted of several components. Some of them are common among the three kinds of specimens and the others are retained components of the initial texture.