Microstructure and Tensile Properties of Al-Cu-Si Alloy with Different Solidification Pressures

被引：3

作者：

Ouyang, X. X. ^{[1
]}

Zhao, H. D. ^{[1
]}

Zhang, K. W. ^{[1
]}

Li, Y. Y. ^{[1
]}

机构：

[1] S China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

ADVANCES IN MATERIALS MANUFACTURING SCIENCE AND TECHNOLOGY XIII, VOL II: MODERN DESIGN THEORY AND METHODOLOGY, MEMS AND NANOTECHNOLOGY, AND MATERIAL SCIENCE AND TECHNOLOGY IN MANUFACTURING | 2009年 / 628-629卷

关键词：

Al-Cu-Si Alloy; Microstructure; Silicon Particles; Tensile Property; SILICON PARTICLES; PARAMETERS;

D O I：

10.4028/www.scientific.net/MSF.628-629.593

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure and tensile properties of as-cast and T6-treated Al-4%Cu-3%Si alloy with different applied solidification pressures were investigated. The pressure has significant effect on the formed microstructure. It is observed that as the pressures increase, the porosities were removed, and the size and the secondary dendrite arm spacing of primary alpha-Al grains decreased evidently, and the morphology of eutectic Si particles changed from long acicular to small granular type. Hence, the tensile properties of the alloy were improved. The research has shown that the aspect ratio (A.R.) of the Si particles decreased after the solution and aging treatment. The A.R of the Si particles in the alloys with applied solidification pressure decreased more remarkably and this indicated that the Si particles can be more prone to be dissolved into a-Al matrix. Thus, the increase of the elongation was achieved.

引用

页码：593 / 598

页数：6

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