Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 3    March 2013

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Hot deformation behavior and processing maps of Mg-Zn-Cu-Zr magnesium alloy
Hui YU1,2, Hua-shun YU1, Young-min KIM2, Bong-sun YOU2, Guang-hui MIN1

1. Key Laboratory for Liquid-Solid Evolution and Processing of Materials, Ministry of Education,
School of Materials Science and Engineering Shandong University, Ji’nan 250061, China;
2. Light Metals Group, Korea Institute of Materials Science, Changwon 642831, Korea

Abstract:The deformation behaviors of a new quaternary Mg-6Zn-1.5Cu-0.5Zr alloy at temperatures of 523-673 K and strain rates of 0.001-1 s-1 were studied by compressive tests using a Gleeble 3800 thermal-simulator. The results show that the flow stress increases as the deformation temperature decreases or as the strain rate increases. A strain-dependent constitutive equation and a feed-forward back-propagation artificial neural network were used to predict flow stress, which showed good agreement with experimental data. The processing map suggests that the domains of 643-673 K and 0.001-0.01 s-1 are corresponded to optimum conditions for hot working of the T4-treated Mg-6Zn-1.5Cu-0.5Zr alloy.

 

Key words: Mg alloy; Cu addition; flow stress; deformation behavior; constitutive equation; artificial neural network; processing map

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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