Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process

被引：33

作者：

Zhang, Yang ^{[1
]}

Wu, Guohua ^{[1
]}

Liu, Wencai ^{[1
]}

Zhang, Liang ^{[1
]}

Pang, Song ^{[1
]}

Ding, Wenjiang ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 67卷

基金：

中国国家自然科学基金;

关键词：

Semi-solid; Rheo-squeeze casting; Magnesium alloy; Microstructure; Mechanical properties; Heat treatment; GRAIN-REFINEMENT; ALUMINUM-ALLOY; CA; VIBRATION; OXIDATION; BEHAVIOR; PARAMETERS; ADDITIONS;

D O I：

10.1016/j.matdes.2014.10.087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rheo-squeeze casting combined with gas bubbling process was proved effective to improve the mechanical properties of AZ91-2 wt% Ca (AZX912) alloy. Increase of gas flow led to improvement of the quality of AZX912 semi-solid slurry and improved ductility of rheo-squeeze casting AZX912 alloy samples. Increase of applied pressure brought refinement in as-cast microstructure and reduction of porosity, as well as continuous improvement in both tensile strength and elongation. Heat treatment at 410 degrees C promoted dissolution of beta-Mg17Al12 phase, morphology modification of Al2Ca phase and further increase of both tensile strength and ductility. Compared with conventional squeeze casting, the mechanical properties of rheo-squeeze casting AZX912 alloy were improved by more than 20%. The improvement in mechanical properties was mainly attributed to the grain refinement in microstructure. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：1 / 8

页数：8

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