Comparative study of the influence of natural convection on directional solidification of Al-3.5 wt% Ni and Al-7 wt% Si alloys

被引：18

作者：

Zhou, B. H. ^{[1
,2
]}

Jung, H. ^{[1
]}

Mangelinck-Noel, N. ^{[1
]}

Nguyen-Thi, H. ^{[1
]}

Billia, B. ^{[1
]}

Liu, Q. S. ^{[2
]}

Lan, C. W. ^{[3
]}

机构：

[1] Univ Paul Cezanne Aix Marseille III, L2MP, UMR 6137, Marseille, France

[2] Chinese Acad Sci, Inst Mech, NML, Beijing, Peoples R China

[3] Natl Taiwan Univ, Dept Chem Engn, Taipei 10764, Taiwan

来源：

ADVANCES IN SPACE RESEARCH | 2008年 / 41卷 / 12期

关键词：

solidification; mushy zone; natural convection; dendrite fragmentation;

D O I：

10.1016/j.asr.2007.06.038

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We present numerical simulations of thermosolutal convection for directional solidification of Al-3.5 wt% Ni and Al-7 wt% Si. Numerical results predict that fragmentation of dendrite arms resulting from dissolution could be favored in Al-7 wt% Si, but not in Al-3.5 wt% Ni. Corresponding experiments are in qualitative agreement with the numerical predictions. Distinguishing the two fragmentation mechanisms, namely dissolution and remelting, is critical during experiments on earth, when fluid flow is dominant. (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：2112 / 2117

页数：6

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