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.
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页码：1144 / 1147
页数：4
相关论文
共 16 条
[1]  
CARNEY TJ, 1990, INT J RAPID SOLIDIF, V5, P1
[2]  
GAYLE FW, 1986, ALUMINIUM LITHIUM AL, V3, P376
[3]   APPLICATION OF THE WEIBULL DENSITY-FUNCTION TO DESCRIBE THE DELTA'-(AL3LI) PARTICLE-SIZE DISTRIBUTION IN BINARY AL-LI ALLOYS [J].
GU, BP ;
LIEDL, GL ;
MAHALINGAM, K ;
SANDERS, TH .
MATERIALS SCIENCE AND ENGINEERING, 1986, 78 (01) :71-85
[4]  
HALL EO, 1951, P PHYS SOC LOND, V64, P427
[5]   EFFECT OF PARTICLE SHAPE ON DISPERSION HARDENING [J].
KELLY, PM .
SCRIPTA METALLURGICA, 1972, 6 (08) :647-&
[6]  
KIM NJ, 1987, ALUMINIUM LITHIUM AL, V4, P457
[7]   PHASE-TRANSFORMATIONS IN THE AL-LI-HF AND AL-LI-TI SYSTEMS [J].
LEVOY, NF ;
VANDERSANDE, JB .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (06) :999-1019
[8]  
Noble B., 1971, Metal Science Journal, V5, P114
[9]  
NORMAN AF, UNPUB ACTA METALL
[10]  
NORMAN AF, IN PRESS INT J RAPID
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