Preparation, microstructure and properties of Al-Al4C3 system produced by mechanical alloying

被引：44
|
作者：
Besterci, M [1 ]
机构：
[1] Slovak Acad Sci, Mat Res Inst, Kosice 04353, Slovakia
来源：
MATERIALS & DESIGN | 2006年 / 27卷 / 05期
关键词：
aluminium-graphite powder system; mechanical alloying; carbon to Al4C3 transformation; Al-Al4C3 dispersion strengthening system; microstructure; tensile deformation; strain rate; superplasticity; creep;
D O I：
10.1016/j.matdes.2004.11.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dispersion strengthened aluminium compacts have been prepared by powder metallurgy. The base microstructure is aluminium matrix strengthened with dispersed ceramic particles. The strengthening is direct by dislocation movement retardation, and indirect by deformation induced microstructure modification in the next technological steps. The method of mechanical alloying process is described. Carbon transformation to carbide Al4C3 is characterised for different heat treatment schedules and nine commercial carbon powders tested. The micromechanism of carbon incorporation into the metallic powder and the compacting of it are described. The influence of dispersed carbides on mechanical properties is evaluated together with the influence of deformation on microstructure and properties. Ductility anomalies up to a type of superplasticity were observed at certain tensile testing strain rates. High temperature tensile test, resistance to creep are available. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：416 / 421
页数：6
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