ZE10镁合金等通道转角挤压的组织与性能

The Microstructure and Properties of ZE10 Magnesium Alloy Prepared by Equal Channel Angular Pressing

在模角Φ=120°的模具中,对ZE10镁合金以BC路径进行了等通道转角挤压(ECAP)试验,对各道次挤压后试样的微观组织及力学性能进行了研究。结果表明,随着挤压道次的增加,晶粒显著细化。挤压道次较少时,显微组织为细晶(1~5μm)+粗晶(约20μm)的混晶组织;挤压8道次后,显微组织比较均匀,细晶晶粒大小为1~2μm;挤压12道次后,等轴晶晶粒大小为0.5~1μm;随着挤压道次与总应变的增加,力学性能显著提高。

The microstructure and tensile behaviors of ZE10 magnesium alloy prepared through equal channel angular pressing (ECAP) by Bc route in the die with a intersecting angle of 120° between channels were investigated.Results indicated that,the grains were refined effectively by increasing the process passes.The initial process passes brought about an unhomogeneous grain structure including fine grains of 1~5 μm and coarse grains of about 20 μm.When the process passes were up to 8,the alloy's microstructure became visibly uniform with fine grains of 1~2 μm.After 12 passes,the alloy acquired uniform equiaxed grains structure with the grain size of 0.5~1 μm.The mechanical properties were improved effectively with the increasing of pressing passes and the total strain.