Hot deformation behavior of a spray-deposited AZ31 magnesium alloy

被引：9

作者：

Li Yongbing ^{[1
]}

Chen Yunbo ^{[1
]}

Cui Hua ^{[2
]}

Ding Jie ^{[1
]}

Zuo Lingli ^{[1
]}

Zhang Jishan ^{[3
]}

机构：

[1] China Acad Machinery Sci & Technol, Adv Mfg Technol Ctr, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

RARE METALS | 2009年 / 28卷 / 01期

关键词：

magnesium alloy; spray forming; flow stress; dynamic recrystallization; DYNAMIC RECRYSTALLIZATION; SUPERPLASTICITY; MICROSTRUCTURE;

D O I：

10.1007/s12598-009-0018-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：91 / 97

页数：7

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