Finite Element Simulation and Experiment of Equal Channel Angular Extrusion Process for AZ31 Magnesium Alloy

Gao Leilei; Zhang Jinzhong; Sha Lei

doi:10.15980/j.tzzz.2016.02.011

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Finite Element Simulation and Experiment of Equal Channel Angular Extrusion Process for AZ31 Magnesium Alloy
Vol. 36, Issue 2, Pages: 152-156(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.02.011

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[1]高雷雷,张金中,沙磊.AZ31镁合金等通道转角挤压的有限元模拟及试验[J].特种铸造及有色合金,2016,36(02):152-156.

Gao Leilei, Zhang Jinzhong, Sha Lei. Finite Element Simulation and Experiment of Equal Channel Angular Extrusion Process for AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 36(2):152-156(2016)
[1]高雷雷,张金中,沙磊.AZ31镁合金等通道转角挤压的有限元模拟及试验[J].特种铸造及有色合金,2016,36(02):152-156. DOI： 10.15980/j.tzzz.2016.02.011.

Gao Leilei, Zhang Jinzhong, Sha Lei. Finite Element Simulation and Experiment of Equal Channel Angular Extrusion Process for AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 36(2):152-156(2016) DOI： 10.15980/j.tzzz.2016.02.011.

摘要

采用Ansys软件建立了等通道转角挤压的有限元模型

对不同模具角度条件下等通道转角挤压过程进行了模拟

获得了摩擦应力、试样与模具内部应力与应变随模具角度的变化。以AZ31镁合金为试验对象

进行了等通道转角挤压试验

对模拟分析结果与试验结果进行了对比。结果表明

等通道转角挤压过程中试样与模具表面会产生较大摩擦应力

导致试样与模具内应力与应变分布不均匀

摩擦应力、材料内部应力及应变随着模具角度增加而减小。挤压后AZ31镁合金微观组织被细化

理论分析结果与试验结果一致。

Abstract

The finite element model of equal channel angular extrusion was established by Ansys software

and the ECAE processes were simulated with different die angles based on the model established.The change of the friction stress

internal stress and strain of the specimen with the die angle were observed.A commercial AZ31 magnesium alloy was subjected to equal channel angular extrusion process.The simulated results were compared with the experimental ones.The results reveal that a larger friction stress is formed during ECAE process on the surfaces of sample and extrusion die

which is responsible for the un-even distribution of the stress and the strain.The friction stress

internal stress and strain of the materials are decreased with the increase of the angle of the die.The grains in the alloy can be refined after ECAE.The theoretical analysis are in agreement with the experimental ones.