Hot deformation behavior of a spray-deposited AZ31 magnesium alloy

查看全文 作　　者：LI [1]Yongbing;CHEN [1]Yunbo;CUI [2]Hua;DING [1]Jie;ZUO [1]Lingli;ZHANG [3]Jishan

机构地区：[1]Advanced Manufacture Technology Center, China Academy of Machinery Science and Technology, Beijing 100083, China;[2]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;[3]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Rare Metals》索引2009年第28卷第1期,共7页

基　　金：supported by the Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China 摘　　要：The flow stress behavior of an as-spray-deposited AZ31 magnesium alloy with fine grains was investigated by means of compression tests with a Gleeble 1500 thermal mechanical simulator at isothermal constant strain rates of 0.01, 0.1, 1.0, and 10 s-1; the testing temperatures ranged from 623 to 723 K. It is demonstrated that a linear equation can be fitted between the Zemer-Hollomon parameter Z and stress in a double-log scale. The effect of deformation parameters on the behavior of recrystallization was analyzed. Dynamic recrystallization (DRX) generally occurs at a higher temperature and at a lower strain rate. The constitutive equation of the spray-deposited AZ31 magnesium alloy is presented by calculating the deformation activation energy (199.8 kJ·mol-1). The as-spray-formed AZ31 alloy is easier for DRX nucleation at elevated temperatures due to the fine grain, which provides a large amount of nucleation sites and a high-diffusivity path for the atom. 关键词：镁合金热变形动态再结晶流应力

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Hot deformation behavior of a spray-deposited AZ31 magnesium alloy

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