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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Hot-compression constitutive relation of as-cast AZ31 magnesium alloy
SHI Ti(史 褆), YU Kun(余 琨), LI Wen-xian(黎文献),
WANG Ri-chu(王日初), WANG Xiao-yan(王晓艳), CAI Zhi-yong(蔡志勇)

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:In hot-compression process, the various factors have obvious effects on the deformation behavior of AZ31 magnesium alloy deformation behavior. To understand the hot-compression constitutive relation thoroughly, the stress-strain behavior of AZ31 magnesium alloy at various strain rates and different deformation temperatures were investigated under maximum strain of 60%. The microstructure of the experimental alloy was studied in the hot-compression procedure. The experimental results show that the relation of peak flow stress, strain rate and temperature can be described by Z parameter which contains Arrheniues item. The strain rate and the deformation temperature are the key parameters affecting deformation activation energy.

 

Key words: magnesium alloys; AZ31; hot-compression; flow stress; microstructure

ISSN 1672-7029
CN 43-1423/U

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