摘要
为了确定挤压路径和挤压道次对Mg-Mn-Zn-Ce合金的显微组织及拉伸性能的影响,采用不同挤压路径对Mg-Mn-Zn-Ce合金进行了不同道次的等通道转角挤压(ECAP).显微组织观察结果表明,经一道次等通道转角挤压后,合金的平均晶粒尺寸约为20μm,而经二道次挤压后,平均晶粒尺寸约为2μm;不同挤压路径所产生的晶粒细化效果大致相同,但在不同挤压方向上,晶粒呈现不同的形状.拉伸试验结果表明,合金的抗拉强度和屈服强度均随着挤压道次的增加而提高,合金的伸长率在一道次挤压后略有提高,而在二道次挤压后明显下降.
In order to determine the influence of both pressing route and pass on the microstructures and tensile properties of the Mg-Mn-Zn-Ce alloy, equal channel angle pressing （ECAP） was conducted under different pressing routes for different passes. The observation of microstructures reveals that the average grain size is about 20 μm after one pass of ECAP, and about 2 μm after two passes of ECAP. The influence of the pressing route on the grain refinement is almost the same, but in different pressing direction, the grains show different morphology. The results of the tensile experiments indicate that the yield and ultimate tensile strengths of the ECAPed Mg-Mn-Zn-Ce alloy get remarkably enhanced with increasing the pressing pass. The elongation of the Mg-Mn-Zn-Ce alloy increases a little after one pass of ECAP while decreases significantly after two passes of ECAP.
出处
《沈阳工业大学学报》
EI
CAS
2008年第3期304-307,332,共5页
Journal of Shenyang University of Technology
基金
辽宁省教育厅基金资助项目(2004D012)
关键词
镁合金
等通道转角挤压
挤压路径
显微组织
拉伸性能
magnesium alloy
equal channel angle pressing
pressing route
microstructure
tensile property
