Influence of environment and of mean stress on fatigue crack growth on a Ti6246 alloy

被引：0

作者：

Sarrazin-Baudoux, C ^{[1
]}

Chabanne, Y ^{[1
]}

Petit, J ^{[1
]}

机构：

[1] ENSMA, CNRS, UMR 6617, Mecan & Phys Mat Lab, F-86960 Futuroscope, France

来源：

FATIGUE '99: PROCEEDINGS OF THE SEVENTH INTERNATIONAL FATIGUE CONGRESS, VOLS 1-4 | 1999年

关键词：

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present study is undertaken to investigated the influence of mean stress on the fatigue crack growth behavior of a Ti6246 alloy in the near-threshold area at room temperature and at 500 degreesC. Tests were performed at various constant K-max levels in ambient air, high vacuum and humidified Argon. According to the environment, the temperature and the loading conditions, the respective contribution of the involved cracking mechanisms which can be fatigue-corrosion or stress corrosion cracking assisted by water vapor or creep-fatigue, is discussed. Then, a special attention is given on the conditions for the occurrence of on apparently abnormal behavior consisting in the disappearance of the threshold for sufficiently high K-max level.

引用

页码：421 / 426

页数：6