THE MICROSTRUCTURE AND PROPERTIES OF HIGH-PRESSURE GAS-ATOMIZED AL-LI-HF ALLOY POWDERS

被引：7
|
作者：
NORMAN, AF
TSAKIROPOULOS, P
机构：
[1] Department of Materials Science and Engineering, University of Surrey, Guildford
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 134卷
关键词：
D O I：
10.1016/0921-5093(91)90942-G
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Powders of the Al-2.2Li-1.23Hf alloy were prepared by high pressure gas atomization and the sub-45-mu-m size fraction was consolidated by extrusion. Continuous and discontinuous precipitation of the alpha' (Al3Li(x)Hf1-x) phase occurred during solution treatment at 450-degrees-C. The delta' phase precipitated during ageing at 190-degrees-C either at the alpha'-matrix interface or as fine delta' particles after prolonged ageing. Peak strength was reached after 1 h at 190-degrees-C. The contributions of the various strengthening mechanisms have been calculated.
引用
收藏
页码：1144 / 1147
页数：4
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