Suppression of Fatigue Crack Propagation of Duralumin by Cavitation Peening

The Journal of Engineering

Fumio Takeo¹  Osamu Takakuwa²  Hitoshi Soyama²  Naoki Kumagai² 

[1] Hachinohe National College of Technology, 16-1 Uwanotai, Tamonoki, Hachinohe, Japan;Tohoku University, 6-6-01, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan

关键词: fatigue life;    fatigue crack propagation suppression;    load-controlled plate bending fatigue tester;    duralumin Japanese Industrial St;    ards;    cavitation peening;    cavitating jet;    laser peening;    cavitation bubble collapses;    mechanical surface modification technique;    fatigue crack propagation behavior;    notch test;    fatigue crack propagation rate;    stress intensity factor range;    JIS A2017-T3;    shot peening;   

DOI  :  10.1049/joe.2015.0066

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

It was demonstrated in the present paper that cavitation peening which is one of the mechanical surface modification technique can suppress fatigue crack propagation in duralumin. The impacts produced when cavitation bubble collapses can be utilised for the mechanical surface modification technique in the same way as laser peening and shot peening, which is called “cavitation peening”. Cavitation peening employing a cavitating jet in water was used to treat the specimen made of duralumin Japanese Industrial Standards JIS A2017-T3. After introducing a notch, fatigue test was conducted by a load-controlled plate bending fatigue tester, which has been originally developed. The fatigue crack propagation behavior was evaluated and the relationship between the fatigue crack propagation rate versus stress intensity factor range was obtained. From the results, the fatigue crack propagation rate was drastically reduced by cavitation peening and the fatigue life of duralumin plate was extended 4.2 times by cavitation peening. In addition, the fatigue crack propagation can be suppressed by 88% in the stable crack propagation stage by cavitation peening.

【 授权许可】

CC BY