Effect of Nd on the microstructure and properties of a TiAl alloy

被引：26
|
作者：
Sun, FS
Cao, CM
Kim, SE
Lee, YT
Yan, MG
机构：
[1] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
[2] Korea Inst Machinery & Mat, Chang Won, Kyungnam, South Korea
来源：
SCRIPTA MATERIALIA | 2001年 / 44卷 / 12期
关键词：
compounds (TiAl); microstructure; mechanical properties; rare earth;
D O I：
10.1016/S1359-6462(01)00973-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Nd on the microstructure and properties of Ti-47.5-0.25Nd was studied. Nd2O3 phase was formed by the addition of Nd to TiAl. Two types of morphologies were observed in the TiAl alloys. The first are large particles, formed by internal oxidation during solidification. The second are small rounded Nd2O3 particles, precipitated at the γ/γ boundary or in the γ matrix during heat treatment. With addition of 0.25 at% Nd, the tensile strengths of Ti-47.5Al-0.25Nd alloy at room temperature and 900°C is increased. The creep resistance of Ti-47.5Al-0.25Nd at 800°C is significantly improved by reinforcement with the Nd2O3 phase.
引用
收藏
页码：2775 / 2780
页数：6
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