Hot deformation behavior and microstructure evolution of a Mg-Gd-Nd-Y-Zn alloy

被引：15

作者：

Hou, Xiu-Li ^{[1
]}

Li, Yan ^{[1
]}

Lv, Peng ^{[1
]}

Cai, Jie ^{[1
]}

Ji, Le ^{[1
]}

Guan, Qing-Feng ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

来源：

RARE METALS | 2016年 / 35卷 / 07期

基金：

中国博士后科学基金;

关键词：

Mg-Gd-Nd-Y-Zn alloy; Hot deformation; Microstructure; Dynamic recrystallization; MAGNESIUM ALLOY; TEXTURE; RECRYSTALLIZATION; PRECIPITATION; COMPRESSION; ALUMINUM;

D O I：

10.1007/s12598-015-0507-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot deformation behavior of homogenized Mg-6.5Gd-1.3Nd-0.7Y-0.3Zn alloy was investigated during compression at temperatures of 250-400 degrees C and at strain rates ranging from 0.001 to 0.100 s(-1). Microstructure analyses show that the flow behaviors are associated with the deformation mechanisms. At the lower temperatures (250-300 degrees C), deformation twinning is triggered due to the difficult activation of dislocation cross-slip. Dynamic recrystallization (DRX) accompanied by dynamic precipitation occurs at the temperature of 350 degrees C and influences the softening behavior of the flow. DRX that develops extensively at original grain boundaries is the main softening mechanism at the high temperature of 400 degrees C and eventually brings a more homogeneous microstructure than that in other deformation conditions. The volume fraction of the DRXed grains increases with temperature increasing and decreases with strain rate increasing.

引用

页码：532 / 536

页数：5

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