Effects of rotating gas bubble stirring treatment on the microstructures of semi-solid AZ91-2Ca alloy

被引：15

作者：

Xu, Jia ^{[1
]}

Wu, Guo-Hua ^{[1
,2
]}

Liu, Wen-Cai ^{[1
,2
]}

Zhang, Yang ^{[1
]}

Ding, Wen-Jiang ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Key State Lab Met Matrix Composite, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2013年 / 1卷 / 03期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Rotating gas bubble stirring; Semi-solid slurry; Processing parameters; Microstructure;

D O I：

10.1016/j.jma.2013.08.002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this study, the effect of rotating gas bubble stirring treatment on the microstructures of semi-solid AZ91-2Ca alloy was investigated. The semi-solid slurry was produced by injecting fine gas bubbles into the melt through a rotating steel diffuser during solidification, and the samples of semi-solid slurry were taken by the rapid quenching method. The results show that fine and spherical alpha-Mg particles can be obtained under rotating gas bubble stirring treatment. The process parameters such as gas flow rate, cooling rate and rotation speed have significant influence on the morphology of primary solid particles. After rotating gas bubble stirring treatment, the higher the particle density, the finer and rounder the primary alpha-Mg particles. The formation of numerous solid particles is due to the combination mechanisms of copious nucleation and dendrite fragmentation. Copyright 2013, National Engineering Research Center for Magnesium Alloys of China, Chongqing University. Production and hosting by Elsevier B.V.

引用

页码：217 / 223

页数：7

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