Effect of Laser Peening with a Microchip Laser on Fatigue Life in Butt-Welded High-Strength Steel
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- Tomoharu Kato
- Major in Systems Engineering, Graduate School of Systems Engineering, Kindai University, Higashihiroshima 739-0042, Japan
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- Yoshihiro Sakino
- Department of Architecture, Faculty of Engineering, Kindai University, Higashihiroshima 739-0042, Japan
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- Yuji Sano
- Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8585, Japan
説明
<jats:p>Laser peening introduces compressive residual stresses on the surfaces of various materials and is effective in enhancing fatigue strength. Using a small microchip laser, with energies of 5, 10, and 15 mJ, the authors applied laser peening to the base material of an HT780 high-strength steel, and confirmed compressive residual stresses in the near-surface layer. Laser peening with a pulse energy of 15 mJ was then applied to fatigue samples of an HT780 butt-welded joint. It was confirmed that laser peening with the microchip laser prolonged the fatigue life of the welded joint samples to the same level as in previous studies with a conventional laser.</jats:p>
収録刊行物
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- Applied Mechanics
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Applied Mechanics 2 (4), 878-890, 2021-10-20
MDPI AG
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詳細情報 詳細情報について
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- CRID
- 1360857593711338752
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- ISSN
- 26733161
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE