Grain refinement of solidified Mg-Al alloys by limited angular oscillation

被引：1
|
作者：
Guo, H. -M. [1 ]
Sheng, Y. -Y. [1 ]
Liu, D. -D. [1 ]
Xie, W. [1 ]
Ge, Z. -P. [1 ]
Yang, X. -J. [1 ]
机构：
[1] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330031, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2012年 / 28卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Magnesium alloys; Grain refining; Solidification; Heterogeneous nucleation; MAGNESIUM ALLOY; ALUMINUM; MICROSTRUCTURE; MECHANISMS; NUCLEANT; MODEL;
D O I：
10.1179/1743284712Y.0000000031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By introducing limited angular oscillation (LAO) during the initial stages of solidification, experiments were conducted to examine the potency of LAO for grain refining of commercial Mg-Al alloys. Significant grain refinement has been successfully achieved at oscillation intensities above the critical value. The refinement effect by solute content occurs across the oscillation intensity range examined and is more pronounced under the conditions of weak oscillation intensity. The refinement effectiveness for Mg-Al alloys is AZ31>AZ61>AZ91. Oscillation intensity plays a more important role in determining the extent of grain refining than the solute content. Theoretical discussions provide new clues to understanding of the mechanism of grain refinement by LAO.
引用
收藏
页码：941 / 947
页数：7
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