2020年12月30日
Effect of Cavitation Peening on Fatigue Properties in Friction Stir Welded Aluminum Alloy AA5754
Metals
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回数 : 115
- ,
- ,
- 巻
- 11
- 号
- 1
- 開始ページ
- 59
- 終了ページ
- 59
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3390/met11010059
- 出版者・発行元
- MDPI AG
Friction stir welding (FSW) is an attractive solid-state joining technique for lightweight metals; however, fatigue properties of FSWed metals are lower than those of bulk metals. A novel mechanical surface treatment using cavitation impact, i.e., cavitation peening, can improve fatigue life and strength by introducing compressive residual stress into the FSWed part. To demonstrate the enhancement of fatigue properties of FSWed metal sheet by cavitation peening, aluminum alloy AA5754 sheet jointed by FSW was treated by cavitation peening using cavitating jet in air and water and tested by a plane bending fatigue test. The surface residual stress of the FSWed part was also evaluated by an X-ray diffraction method. It was concluded that the fatigue life and strength of FSWed specimen were improved by cavitation peening. Whereas the fatigue life at σa = 150 MPa of FSWed specimen was about 1/20 of the bulk sheet, cavitation peening was able to extend the fatigue life of the non-peened FSW specimen by 3.6 times by introducing compressive residual stress into the FSWed part. This is the first paper to demonstrate the improvement of fatigue properties of FSWed metallic sheet by cavitation peening.
- リンク情報
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- DOI
- https://doi.org/10.3390/met11010059 本文へのリンクあり
- 共同研究・競争的資金等の研究課題
- 粒子を含有した流動キャビテーションによる新機能性材料の創成
- 共同研究・競争的資金等の研究課題
- パルスレーザを用いた固気液界面現象解明ならびに有効利用
- URL
- https://www.mdpi.com/2075-4701/11/1/59/pdf 本文へのリンクあり
- ID情報
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- DOI : 10.3390/met11010059
- eISSN : 2075-4701