Gamma titanium aluminide, TNB

被引：84

作者：

Voice, WE

Henderson, M

Shelton, EFJ

Wu, XH

机构：

[1] Rolls Royce PLC, Derby DE24 8BJ, England

[2] Alstom Power, Leicester LE8 6LH, Leics, England

[3] QinetiQ, Farnborough GU14 0LX, Hants, England

[4] Univ Birmingham, IRC Mat, Birmingham B15 2TT, W Midlands, England

来源：

INTERMETALLICS | 2005年 / 13卷 / 09期

关键词：

titanium alummides; based on TiAl; fatigue resistance and crack growth; aero-engine components;

D O I：

10.1016/j.intermet.2004.12.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A range of mechanical properties for wrought TNB alloy (Ti-45Al-8Nb-0.2C%) and cast Ti4522XD(Ti-45Al-2Nb-2Mn-XD) have been assessed. The influence of notch sensitivity on fatigue strength has been evaluated and compared in terms of different microstructure and alloy composition. The effects of complex loading on fatigue strength have also been investigated with pre-creep deformations of 0.5, 3 and 5%, pre-exposure to 700 degrees C for 24 and 150 h or pre-low cycle fatigue testing at 700 degrees C. The tolerance of these materials to foreign object damage (FOD) has also been compared with the nickel alloy IN718. Under most conditions the TNB alloy has shown superior performance to Ti4522XD and its FOD tolerance appears to be better than IN718. (c) 2005 Published by Elsevier Ltd.

引用

页码：959 / 964

页数：6