等通道转角挤压（Equal channel angular pressing，简称ECAP）可以使镁合金产生较大的塑性变形。通过有限元方法模拟了等通道转角挤压工艺及其相关工艺参数，研究了工件的应变和载荷分布情况，并建立了累积变形结果、微观组织细化和力学性能的数学模型。通过分析得到了晶粒细化和力学性能的关系，对累积变形的特点分析，预测了晶粒细化后的尺寸和力学性能。%The equal channel angular pressing (ECAP) was used to make large plastic deformation of magnesium alloy, and ECAP processing and relevant process parameters were obtained by using finite element method. The strain distributions in the workpieces and the loads on the dies were studied. The mathematical model of accumulated deformation results , microstructure refinement and mechanical properties were established. Through the analysis, the relationships between grain refinement and mechanical properties were obtained. The refined grain size and the obtained mechanical properties are forecasted by using characterization of accumulation deformation.
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