Effect of solidification cooling rate on the morphology and number per unit volume of primary Mg2Si particles in a hypereutectic Al-Mg-Si alloy

被引：45

作者：

Ourfali, MF ^{[1
]}

Todd, I

Jones, H

机构：

[1] Sci Studies & Res Ctr, Casting Lab, Damascus, Syria

[2] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2005年 / 36A卷 / 05期

关键词：

D O I：

10.1007/s11661-005-0228-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Growth morphology and number N-v per unit volume have been determined vs withdrawal velocity V over the range 0.1 to 4 mm/s for primary Mg2Si in a Bridgman-solidified hypereutectic Al-Mg-Si alloy. Primary Mg2Si shows a transition from irregular or regular polyhedral to dendritic with increasing V, and N-v increases with solidification cooling rate T according to the relationship N-v/T = 270 +/- 110 mm(3) (K/s)(-1). These results are compared with corresponding ones for Al-Mg-Si alloy wedge castings and for primary silicon in hypereutectic Al-Si alloys.

引用

页码：1368 / 1372

页数：5

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