Effect of Mg and semi solid processing on microstructure and impression creep properties of A356 alloy

被引：26
作者：
Esgandari, B. Amir [1 ]
Nami, B. [2 ]
Shahmiri, M. [1 ]
Abedi, A. [2 ]
机构：
[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran, Iran
[2] Shahid Rajaee Teacher Training Univ, Dept Mech Engn, Tehran, Iran
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2013年 / 23卷 / 09期
关键词：
A356; alloy; microstructure; semi solid processing; impression creep; dislocation climb controlled creep; CALCIUM; CAST;
D O I：
10.1016/S1003-6326(13)62763-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of Mg and semi solid processing on the creep properties of A356 Al alloy were investigated. The results show that the dislocation climb controlled creep is the dominant creep mechanism and it is not affected by the semi solid processing and further addition of Mg. Mg improves the alloy creep properties probably by forming large Chinese script Mg2Si compounds at the interdendritic regions. The semi solid processed specimens exhibit better creep properties in comparison with the as cast ones. It is attributed to the reduction in the stacking fault energy resulting from the significant dissolution of Mg in the alpha(Al) phase.
引用
收藏
页码：2518 / 2523
页数：6
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