Factors influencing tensile ductility of ultrafine-grained Mg-3Al-1Zn alloy sheet at elevated temperatures

被引：6

作者：

Kim, W. J. ^{[1
]}

Lee, B. H. ^{[1
]}

机构：

[1] Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 21-22期

关键词：

Mechanical characterization; Magnesium alloys; Thermomechanical processing; Grain refinement; MAGNESIUM ALLOY; AZ31; SUPERPLASTICITY; DEFORMATION; TEXTURE;

D O I：

10.1016/j.msea.2010.05.090

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tensile elongation behavior of ultrafine-grained (UFG)Mg-3Al-1Zn (AZ31) alloy sheet (with a mean grain size of 1 mu m) produced by high-ratio differential speed rolling was studied at elevated temperatures, and factors influencing the ductility were evaluated. The UFG AZ31 showed an obvious advantage in ductility enhancement below 473 K, but the maximum forming temperature was limited due to high thermal instability of the UFG AZ31 microstructure. There was a pronounced effect of grain coarsening during the sample heating and deformation on strain-rate sensitivity and strain hardening. The tensile elongation behavior of UFG AZ31 with high density of thermally stable (Al, Mg)(2)Ca particles was compared with that of UFG AZ31 to see what happens if grain coarsening is well suppressed in UFG AZ31 alloy. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：5984 / 5989

页数：6

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