Suppression of Fatigue Crack Propagation of Duralumin by Cavitation Peening

Hitoshi Soyama; Naoki Kumagai; Osamu Takakuwa; Fumio Takeo

Suppression of Fatigue Crack Propagation of Duralumin by Cavitation Peening

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Author(s): Hitoshi Soyama¹ ; Naoki Kumagai¹ ; Osamu Takakuwa¹ ; Fumio Takeo²
- Affiliations: 1: Tohoku University , 6-6-01, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579 , Japan ;
  2: Hachinohe National College of Technology , 16-1 Uwanotai, Tamonoki, Hachinohe , Japan
Source: Volume 2015, Issue 13, May 2015, p. 126 – 128
DOI: 10.1049/joe.2015.0066 , Online ISSN 2051-3305

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)

Received 14/04/2015, Accepted 21/04/2015, Published 30/06/2015

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.

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Suppression of Fatigue Crack Propagation of Duralumin by Cavitation Peening

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