Effects of hot extrusion and annealing treatment on microstructures, properties and texture of AZ31 Mg alloy
(1.江苏省苏州市苏州有色金属研究院
2.Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China
3.Suzhou Institute for Non-ferrous Metals Processing Technology, Suzhou 215021, China)
2.Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China
3.Suzhou Institute for Non-ferrous Metals Processing Technology, Suzhou 215021, China)
Abstract: Effects of extrusion deformation and heat treatment on microstructures, mechanical properties and texture of AZ31 Mg alloy were investigated．The results show that the microstructures of as-cast AZ31 alloy are markedly refined after hot extruding, the average grain size is about 25 μm and strong fiber texture exists in the extruded AZ31 alloy. The mechanical properties are improved obviously. The grain size is somewhat inhomogeneous and strip structure emerges along the extrusion direction due to incomplete dynamic recrystallization during the extrusion process. With increasing annealing temperature, the small grain grows up and turns into equiaxed grain, and the texture is weakened with the visible growing up of grains.
Key words: AZ31 alloy; Mg alloy; texture; mechanical properties; hot extrusion