和织构的影响
(1. 东北大学 材料与冶金学院，沈阳 110004；
2. 沈阳理工大学 装备工程学院，沈阳 110168)
摘 要: 研究了挤压比、挤压温度及电场退火对AZ31镁合金组织和织构的影响。结果表明：挤压比达到16时动态再结晶基本完成，挤压比为25时形成平均晶粒尺寸为7.3 µm的均匀组织；随着挤压比由小到大，以{0110}
关键字: AZ31镁合金；织构；动态再结晶；挤压比；挤压温度；电场退火
microstructure and texture of
AZ31 magnesium alloy
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
2. School of Equipment Engineering, Shenyang Ligong University, Shenyang 110168, China）
Abstract:The effect of extrusion ratio, temperature and electric field annealing on microstructure and texture of AZ31 magnesium alloy were investigated. The results show that the dynamic recrystallization is completed when the extrusion ratio reaches 16. When the extrusion ratio is 25, the microstructure of fine and even grains with average dimension of 7.3 μm can be obtained. With increasing extrusion ratio, the deformation textures represented by {0110} surface texture decrease, while the recrystallization textures of {0221} and {1231} increase. With increasing extrusion temperature, high temperature extrusion helps to diffuse alloy elements and produces dynamic recrystallization, which stops a discontinuous precipitation of Mg17A112 and MnA1 from being separated out. The microstructure tends to become even. The main texture components have changed from {0110} surface texture to {0661} ore. For AZ31 magnesium alloy, its annealing in electric field delays the process of recrystallization. As a result, it refrains the recrystallized grains from growing and increases the diffusion of annealing texture.
Key words: AZ31 magnesium alloy; texture; dynamic recrystallization; extrusion ratio; extrusion temperature; electric field annealing
