Microstructure and mechanical properties of a high volume fraction SiC particle reinforced AlCu4MgAg squeeze casting

被引：40

作者：

Long, S

Beffort, O ^{[1
]}

Cayron, C

Bonjour, C

机构：

[1] Swiss Fed Labs Mat Testing & Res, CH-3602 Thun, Switzerland

[2] Ecole Polytech Fed Lausanne, Interdept Ctr Electron Microscopy, CH-1015 Lausanne, Switzerland

[3] Swiss Engn Coll W Switzerland, Valais Engn Sch, CH-1950 Sion, Switzerland

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 269卷 / 1-2期

关键词：

metal matrix composite; microstructure; mechanical properties; squeeze infiltration;

D O I：

10.1016/S0921-5093(99)00163-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and mechanical properties of a high volume fraction SiC particle reinforced AlCu4MgAg alloy produced by squeeze pressurised infiltration of dense packed particle preforms were characterised. It was found that the addition of 60 vol.% 12 mu m SiC particles eliminates the processing related intrinsic macrosegregation of the matrix alloy, induces coarse precipitates in as-cast matrix, but does not impede matrix grain growth. The SiC-Al interfacial chemical reaction is suppressed to a limited extent. In T6 condition, the interfacial intermetallics are largely dissolved and the matrix is decorated with fine and dense precipitates of theta' and Q phases. The addition of SiC particles accelerates the age-hardening response of the matrix alloy. Mechanically, the stiffness, hardness, flexural strength, fatigue strength and abrasive wear resistance are substantially improved, together with significantly reduced fracture toughness and ductility in comparison with the matrix alloy. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：175 / 185

页数：11

共 25 条

[11] Effects of process parameters on the properties of squeeze-cast SiCp-6061 Al metal-matrix composite [J].