Solidification of Al-Bi-Sn immiscible alloy under microgravity conditions of space

被引：35
|
作者：
Li, Wang [1 ,2 ]
Jiang, Hongxiang [1 ]
Zhang, Lili [1 ]
Li, Shixin [1 ,2 ]
He, Jie [1 ]
Zhao, Jiuzhou [1 ,2 ]
Ai, Fei [3 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Alloys; Solidification; Modeling; Simulation; Microgravity; MICROSTRUCTURE EVOLUTION; MODEL;
D O I：
10.1016/j.scriptamat.2018.12.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Al-Bi-Sn alloy was solidified directionally in space. The sample shows a well-dispersed microstructure. A model was developed to describe the microstructure formation during solidification. Calculations demonstrate that the Stokes settlement of the Minority Phase Droplets (MPDs) and the convection of the melt are against the establishment of the steady state of solidification and macro-segregation occurs soon after the beginning of the solidification on ground. The diminished melt convection and the Stokes motions of the MPDs under microgravity conditions promote the establishment of the steady state of solidification and the formation of a well-dispersed microstructure. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
引用
收藏
页码：426 / 431
页数：6
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