On the orientation relationship between Ti5Si3 precipitates and B2 phase in a Ti-47Al-2W-0.5Si alloy

被引：23

作者：

Yu, R ^{[1
]}

He, LL

Jin, ZX

Guo, JT

Ye, HQ

Lupinc, V

机构：

[1] Acad Sinica, Inst Met Res, Lab Atom Imaging Solid, Shenyang 110015, Peoples R China

[2] CNR, TEMPE, I-20133 Milan, Italy

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 06期

基金：

中国国家自然科学基金;

关键词：

intermetallic compound; TEM; electron diffraction; microstructure; orientation relationship;

D O I：

10.1016/S1359-6462(00)00693-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ti-47Al-2W-0.5Si alloy is a developed γ-TiAl based alloy that has excellent creep resistance. The additions of W and Si play an important role in improving the creep resistance. Silicon has an extrinsic effect through the formation of ζ-Ti5Si3 particles, especially at the interfaces of (α2 + γ) lamellar structure. W can also improve the creep resistance through the formation of the B2 particles at the lamellar interfaces. Due to the β stabilization effect of W, blocky B2 phase is always formed in this alloy. In the B2 phase, Ti5Si3 particles are often formed. The orientation relationship between the Ti5Si3 precipitates and B2 phase was investigated.

引用

页码：911 / 916

页数：6

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