Preparation and Microstructure Characterization of Ti-Based Alloy (TiAl plus Ti) by Hot-pressed Sintering

被引：0
|
作者：
Yu Qiuying [1 ]
Fang Shuang [1 ]
Xiong Huaping [1 ,2 ]
Zhao Hengyue
Zhang Mincong [1 ]
Wang Shuyun [1 ]
机构：
[1] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
[2] Shenyang Aircraft Corp, Shenyang 110013, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 05期
关键词：
TiAl intermetallic; titanium based alloy; hot-press sintering; diffusion reaction; microstructure; FUNCTIONALLY GRADED MATERIAL; GAMMA-TITANIUM ALUMINIDES; HIGH-TEMPERATURE; DESIGN;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
TiAl strengthened Ti-based alloy was prepared by hot-pressed sintering of mixed powders of TiAl and Ti at 1473 K under a pressure of 30 MPa for 1.5 h. The effects of composition ratio on the phase constituent and microstructures of hot-pressed sintering products were subsequently analyzed by XRD and SEM. A large difference exists in the phase distribution for the sintering products with different composition ratios. The feasibility of TiAl reinforced Ti-based alloy is confirmed with TiAl/Ti volume ratio of 7:3. Element Fe is concentrated in Ti2Al and Ti3Al. TiAl, Ti2Al(Fe), Ti3Al(Fe) and Ti-based phases are mainly formed in the sintered product. Different types of diffusion reactions occur within the sintered body during hot-pressed sintering, and finally fine graded microstructures, Ti/Ti3Al(Fe)//Ti2Al(Fe)/TiAl, are formed.
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页码：1370 / 1374
页数：5
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