Microstructural evolution of AZ61 magnesium alloy predeformed by ECAE during semisolid isothermal treatment

被引：31

作者：

Jiang Ju-fu ^{[1
,2
]}

Lin Xin ^{[2
]}

Wang Ying ^{[3
]}

Qu Jian-jun ^{[3
]}

Luo Shou-jing ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[3] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

AZ61 magnesium alloy; semisolid isothermal treatment; equal channel angular extrusion; microstructural evolution; DYNAMICAL SOLIDIFICATION BEHAVIORS; AZ91D ALLOY; PARAMETERS; EXTRUSION; SLURRY;

D O I：

10.1016/S1003-6326(11)61213-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The microstructural evolution of AZ61 magnesium alloy predeformed by equal channel angular extrusion (ECAE) during semisolid isothermal treatment (SSIT) was investigated by means of optical metalloscopy and image analysis equipment. The process involved application of ECAE to as-cast alloy at 310 degrees C to induce strain prior to heating in the semisolid region for different time lengths. The results show that extrusion pass, isothermal temperature and processing route have an influence on microstructural evolution of predeformed AZ61 magnesium alloy during SSIT. With the increase of extrusion pass, the solid particle size is reduced gradually. When isothermal temperature increases from 530 degrees C to 560 degrees C, the average particle size increases from 22 mu m to 35 mu m. When isothermal temperature is 575 degrees C, the average particle size decreases. The particle size of microstructure of AZ61 magnesium alloy predeformed by ECAE at B-C during SSIT is the finest.

引用

页码：555 / 563

页数：9

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