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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 4    August 2002

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Effects of can parameters on canned-forging
 process of TiAl base alloy(Ⅱ)——Mechanical behavior
LIU Yong(刘  咏),HE Shuang-zhen(何双珍),HUANG Bai-yun(黄伯云),
WEI Wei-feng(韦伟峰),HE Yue-hui(贺跃辉),ZHOU Ke-chao(周科朝)

State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China

Abstract:By using thermal simulation technique and computer simulation, the conventional canned-forging process of TiAl base alloy was studied. The effect of can parameters on the mechanical behavior of TiAl alloys with different H/D ratios was analyzed in this process. The results show that, the pea k stress of TiAl base alloy without canning is far higher than that with canning. Compared with the samples with the same H/D ratio, the peak stress decreases with increasing can thickness; while compared with the samples with the same can thickness, the peak stress decreases with increasing H/D ratio. The decrease of t he true stress of TiAl base alloy with canning were analyzed according to the theory of plastic deformation and results of computer simulation. 

 

Key words: TiAl base alloy; thermal mechanical treatment ; mechanical behavior; computer simulation

ISSN 1672-7029
CN 43-1423/U

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