Precipitation Behavior,Texture and Mechanical Properties of AZ80 Magnesium Alloy Produced by Equal Channel Angular Extrusion
等通道挤压AZ80镁合金的析出行为和性能

AZ80 magnesium alloy was subjected to ECAP (equal channel angular extrusion) processing at 300 . The evolution of microstructure, texture and mechanical properties influenced by the precipitation was investigated. The results show that ECAP processing significantly favored granular–like Mg17Al12 continuous precipitation in accompany with reducing time effectively during subsequent aging treatment; basal texture can be obtained via route A after ECAP with multi passes, whereas typical shear texture with most basal planes parallel to the shear plane of mode in route Bc; however the precipitation has not remarkable effect on the texture development during ECAP. A relative low ultimate tensile strength of 300 MPa and an improved elongation of 19% were obtained in the processed samples due to strong texture and coarse precipitates. Further optimization should be made by means of impeding the precipitation of the coarse particles before ECAP and decreasing the number of pass and pressing temperature.