Crystallographic Textures of Al and Al-Mg Alloy Formed by Shot-Peening

Shot-peening (SP) is well known as surface severe plastic deformation (SSPD) processing technique. In our previous study, it has been reported that a {110} fiber texture, in which the <110> direction is parallel to the plane normal direction of the peened surface, is formed by the SP for the pure Cu plate. Since this crystallographic texture is formed depending on the dislocation slip, the crystallographic texture by the SP would be affected by stacking fault energy (SFE) of the materials. However, effects of the SFE on the crystallographic texture by the SP is not clear. In this study, the crystallographic textures of pure Al and Al-10 mass%Mg alloy by the SP are investigated. The SFE of the pure Al is higher than that of the Al-10 mass%Mg alloy. When the pure Al is SPed, {001}+{111} double fiber texture with the <001> and <111> directions parallel to the plane normal direction of the peened surface is obtained. On the other hand, in the case of Al-10 mass%Mg alloy with the SFE close to the pure Cu, {110} fiber texture is formed as well as the pure Cu. Therefore, it is concluded that the crystallographic texture formed by the SP is influenced by the SFE.