采用周向剪切挤压变形制备高性能细晶镁合金工艺研究

Study on Radial Shear Extrusion Process to Fabricate Magnesium Alloy with High Performance and Fine Grains

为了获得性能良好的细晶镁合金材料,设计出连续周向剪切挤压变形工艺。采用有限元模拟软件分析了变形温度对挤压过程中材料流动、应力及应变演变的影响。进一步以模拟结果为指导,在不同温度下进行周向剪切挤压实验。结果表明:该变形工艺可有效细化晶粒,为高性能镁合金的制备提供了一条有效途径。

In order to obtain the high performance and grain refined magnesium alloy,the continual radial shear extrusion process was designed.The effect of deformation temperature on the material flow,stress,strain evolution was analyzed by using finite element simulation software.Taking the simulation results as the guidance,the radial shear extrusion experiments were carried out at different temperatures.The results show that the grains can be refined obviously by the shear extrusion.It provides an effective way to achieve high performance magnesium alloy.