High-temperature mechanical properties of hot isostatically pressed and forged gamma titanium aluminide alloy powder

被引：48
作者：
Wegmann, G
Gerling, R
Schimansky, FP
Clemens, H
Bartels, A
机构：
[1] GKSS Forschungszentrum Geesthacht GmbH, Mat Res Inst, D-21502 Geesthacht, Germany
[2] Tech Univ Hamburg, D-21073 Hamburg, Germany
来源：
INTERMETALLICS | 2002年 / 10卷 / 05期
关键词：
titanium aluminides; based on TiAl; superplastic behaviour; powder metallurgy; microstructure;
D O I：
10.1016/S0966-9795(02)00026-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The high-temperature mechanical properties of a powder metallurgically produced Ti-47Al-4(Nb, Mn, Cr, Si, B) (at.%) alloy characterized by a very fine and homogeneous near gamma microstructure (d = 0.9 mum) were studied in the temperature range of 890 to 1100 degreesC. The unique microstructure was accomplished by a special processing route. Gas atomized alloy powder was compacted by hot isostatic pressing and then forged at a relatively low temperature of 850 degreesC. The material exhibits superplastic properties at parameters which are attractive for technical applications. At 1000 degreesC a tensile elongation of 920% was achieved at a low level of cavitation. (C) 2002 Elsevier Science Ltd. All rights reserved.
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收藏
页码：511 / 517
页数：7
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