等通道角挤压AZ31镁合金的微观组织与力学性能

冯小明; 艾桃桃; 张会

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等通道角挤压AZ31镁合金的微观组织与力学性能
Microstructure and Mechanical Properties of Equalchannel Angular Pressed AZ31 Magnesium Alloy
2008年第7期页码：499-501
纸质出版日期： 2008 ，
DOI：

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[1]冯小明,艾桃桃,张会.等通道角挤压AZ31镁合金的微观组织与力学性能[J].特种铸造及有色合金,2008(07):499-501+487.

Feng Xiaoming, Ai Taotao, Zhang Hui. Microstructure and Mechanical Properties of Equalchannel Angular Pressed AZ31 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2008,(7):499-501.
[1]冯小明,艾桃桃,张会.等通道角挤压AZ31镁合金的微观组织与力学性能[J].特种铸造及有色合金,2008(07):499-501+487. DOI：

Feng Xiaoming, Ai Taotao, Zhang Hui. Microstructure and Mechanical Properties of Equalchannel Angular Pressed AZ31 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2008,(7):499-501. DOI：

摘要

借助X射线衍射仪、光学显微镜等分析设备

研究了AZ31镁合金在等通道角挤压变形过程中微观组织与力学性能随加工道次的变化行为。结果表明

随挤压道次的增加

晶粒不断细化

力学性能发生显著变化

伸长率不断增大

抗拉强度逐渐降低。挤压8道次后

晶粒尺寸由最初的120μm减小到9μm。由于晶粒细化效应

导致α相主要变形机制由1道次的孪生变为随后道次的位错滑移。挤压后（0001）晶面的取向分布分散性

影响抗拉强度。伸长率的增大与晶粒细化和滑移面的激活有关。

Abstract

Effects of the pressing passes on the microstructure and mechanical properties of AZ31 magnesium alloy during equal-channel angular prissing （ECAP） were investigated by X-ray diffraction and optical microscope.The results indicate that with inceasing in the pressing passes

elongation of the alloy is increased and the tensile strength is decreased as a result of the refinement of grain size.After 8 passes

grain size in the alloy is decreased from 120 μm to 9 μm

which is responsible for the deformation mode of α phase from twining in the first passes to the dislocation slip in the following passes.After pressing

the dispersive orientation of （0001） crystal face influences the tensile strength of alloy.Increase of elongation is attributed to the refinement effects and the activation of sliding plane.