Effect of alloying elements and degassing pressure on the structure and mechanical properties of rapidly solidified Al-20Si-5Fe-2X (X = Cr, Zr, or Ni) alloys

被引：0

作者：

Kim, TS

Suryanarayana, C ^{[1
]}

Chun, BS

机构：

[1] Colorado Sch Mines, George S Ansell Dept Met & Mat Engn, Golden, CO 80401 USA

[2] Chungnam Natl Univ, Rapidly Solidified Mat Res Ctr, Taejon 305764, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 278卷 / 1-2期

关键词：

rapid solidification; Al-Si-Fe-Cr; Al-Si-Fe-Zr; and Al-Si-Fe-Ni alloys; x-ray diffraction; electron microscopy; mechanical properties; degassing pressure;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Rapidly solidified Al-20Si-5Fe-2X (X = Cr, Zr, or Ni) alloys produced by gas atomization were degassed under different vacuum levels before consolidating them by hot extrusion. The microstructure and mechanical properties of the as-solidified and extruded alloys were evaluated. It was shown that the addition of a quaternary element resulted in the formation of very fine particles that contributed to the improved mechanical properties of the alloys, especially at elevated temperatures. Of these additions, nickel was found to be the most effective in increasing the UTS of the alloy both at room and elevated temperatures. Degassing the rapidly solidified powders under better vacuum improved the properties further. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：113 / 120

页数：8

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