The microstructure, tensile, and shear deformation behavior of an AZ31 magnesium alloy after extrusion and equal channel angular pressing

被引：114
作者：
Masoudpanah, S. M. [1 ]
Mahmudi, R. [1 ]
机构：
[1] Univ Tehran, Sch Met & Mat Engn, Tehran, Iran
来源：
MATERIALS & DESIGN | 2010年 / 31卷 / 07期
关键词：
MG ALLOY; MECHANICAL-PROPERTIES; ROOM-TEMPERATURE; DUCTILITY; STRENGTH;
D O I：
10.1016/j.matdes.2010.02.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The shear punch testing (SPT) technique and the uniaxial tension tests were employed to evaluate the mechanical properties of the equal channel angularly pressed (ECAPed) AZ31 magnesium alloy. After extruding, the material was ECAPed for 1, 2, and 4 passes using route B. The grain structure of the material was refined from 20.2 to 1.6 mu m after 4 passes of ECAP at 200 degrees C. The 4 pass ECAPed alloy showed lower yield stress and higher ductility as compared to the as-extruded condition, indicating that texture softening has overcome the strengthening effects of grain refinement. The same trends in strength and ductility were also observed in shear punch testing. Similar shear strength and ductility values of the samples taken perpendicular to the extrusion direction (ED) and normal direction (ND) after 4 passes of ECAP indicated that (0002) basal planes were inclined (similar to 45 degrees) to the extrusion axis. The shear punch testing technique was found to be a useful method for verifying directional mechanical properties of the miniature samples of the ECAPed magnesium alloys. (c) 2010 Elsevier Ltd. All rights reserved.
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页码：3512 / 3517
页数：6
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