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. 10    No. 4    August 2000

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Densification abnormality in reactive hot pressing of  Ti and Al elemental powders①
LIU Yong(刘 咏), HUANG Bai-yun(黄伯云), HE Yue-hui(贺跃辉), ZHOU Ke-chao(周科朝)

State Key Laboratory for Powder Metallurgy,
Central South University of Technology, Changsha 410083, P.R.China

Abstract:The densification behavior of a TiAl base alloy prepared by elemental powder metallurgy has been studied. It is found that a densification abnormality occurs at 1 400℃, i.e. the compact density decreases with the increase of hot pressing temperature. By microstructural observation, including optical microscopy and TEM, it has been concluded that the densification abnormality can be attributed to the different high temperature creep mechanisms induced by microstructure coarsening in the late period of densification.

 

Key words: TiAl base alloy; densification; powder metallurgy; microstructure

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

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

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