Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 5    No. 2    June 1995

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EFFECTS OF TWO-STEP HEAT-TREATMENT ON MICROSTRUCTURE AND PROPERTIES OF TiAl INTERMETALLICS
Kong Gaoning; Huang Baiyun; Qu Xuanhui; Lei Changming; He Yuehui

Powder metallurgy Research Institute; Central South University of Technology; Changsha 410083

Abstract:Special heat-treatment was used to improve the mechanical properties at room temperature of TiAl-based alloys which were isothermal forged (1050℃, 82%). The results showed that proper two-step heat treatment could decrease or eliminate large-grained lamellar structure produced by inhomogeneous deformation,and gain fine, homogeneous duplex microstructure. And the volume ratio of γ:α2/γ was about 1:1. The room temperature ductility of the TiAl alloys reached 3. 3% with high strengths.

 

Key words: intermetallics heat treatment tensile properties

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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