Author:
Nie Baohua,Liu Shuai,Wu Yue,Song Yu,Qi Haiying,Shi Binqing,Zhao Zihua,Chen Dongchu
Abstract
The effect of low cycle fatigue (LCF) predamage with no precracks on very high cycle fatigue (VHCF) properties, and crack initiation characteristics for TC21 titanium alloy, was investigated. The results showed that LCF predamage with less than 5% of fatigue life had little influence on fatigue limit, but reduced its fatigue life. Fatigue cracks were initiated on the surface of the specimen at high stress amplitude, whereas fatigue cracks were initiated on the subsurface of the specimens at low stress amplitude. Based on Lemaitre damage theory, a very high/low cycle combined fatigue damage model was established to analyze the fatigue damage process, which was consistent with the experimental data. It was indicated that 5% LCF predamage value was the equivalent damage value, which was close to the critical value of VHCF crack initiation. The fatigue crack initiation of the specimens with LCF predamage less than 5% took up the major components of fatigue life.
Funder
R and D plan for key areas in Guangdong Province
Core technology research project of Foshan
Basic and applied basic research fund project in Guangdong Province
Science and technology project in Guangdong
R and D plan for key areas in Jiangxi Province
Foshan Material Computing Engineering Technology Research Center
Innovation driven project of science and technology plan in Jiangxi Yichun
Graduate Free Exploration Fund of Foshan University
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献