Effect of al content on phase constitution and tensile properties of Ti-13mass%Cr-1mass%Fe-Al alloys

被引：0

作者：

Ogawa, Michiharu ^{[1
]}

Shimizu, Tetsuya ^{[1
]}

Noda, Toshiharu ^{[1
]}

Ikeda, Masahiko ^{[2
]}

机构：

[1] Daido Steel Co Ltd, Res & Dev Lab, Nagoya, Aichi 4578545, Japan

[2] Kansai Univ, Fac Engn, Dept Mat Sci & Engn, Suita, Osaka 5648680, Japan

来源：

INNOVATIONS IN TITANIUM TECHNOLOGY | 2007年

关键词：

titanium-chromium-iron-aluminum alloy; electrical resistivity; tensile strength; athermal omega; isothermal omega;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The influence of Al content on phase constitution and tensile properties of Ti-13mass%Cr-1mass%Fe-Al alloys was investigated by measurement of electrical resistivity and Vickers hardness, X-ray diffractometry (XRD) and tensile test. For all solution treated and quenched (STQed) specimens, only P reflection was detected by XRD. Resistivity at room and liquid nitrogen temperatures increased monotonically with Al content. Vickers hardness kept almost the same value as STQed specimen up to 3.0mass%Al and then increase with Al content. In the isochronal heat treatment, two minima of resistivity ratio (pLN/pRT) were observed at 623K and 823K, respectively. The former is due to the precipitation of isothermal omega phase and the latter is a precipitation. The temperature of resistivity minimum attributing to omega phase precipitation gradually increases with Al content. In the alloys with 4.5mass%Al and more, the minimum of resistivity associated with omega precipitation disappeared and the minimum caused by alpha precipitation remained. It is considered that Al content above 4.5msss% was suppressed isothermal omega precipitation and enhanced a precipitation. In STQed alloys, tensile strength increased slightly with Al content and elongation at fracture kept almost constant value. Ti-13mass%Cr-1mass%Fe-Al alloys in STQed state without isothermal omega precipitation bad the comparable tensile properties to Ti-22mass%V-4mass%Al, one of the most popular beta titanium alloy.

引用

页码：179 / +

页数：2