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

您目前所在的位置:首页 - 期刊简介 - 详细页面


Transactions of Nonferrous Metals Society of China

Vol. 30    No. 3    March 2020

[PDF Download]    [Flash Online]    [HTML全文阅读]


Processing map and hot deformation behavior of Ta-particle reinforced TiAl composite
Cheng-hao YUAN, Bin LIU, Yu-xi LIU, Yong LIU

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

Abstract:The hot deformation behavior of a Ta-particle reinforced TiAl composite was studied. Ti-48Al-2Cr-2Nb- 0.2W(at.%)/20vol.%Ta metal matrix composite was fabricated by spark plasma sintering. The deformation behavior was investigated by hot compression tests at the temperature ranging from 1050 to 1200 °C and the strain rate ranging from 1×10-3 to 1 s-1. The constitutive equation containing true strain variables was established. The values of activation energy Q under different strain degrees are between 240 and 280 kJ/mol, which are lower than that of pure TiAl. Based on dynamic material modeling, the processing maps at various strain degrees were established, and the optimized parameters for hot working are 1050-1100 °C and 0.005-0.01 s-1. The microstructural evolution during deformation was characterized, which indicated that the dynamic recrystallization plays an important role in this process.


Key words: TiAl-based composite; flow behavior; processing map; dynamics recrystallization

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱