Improvement of fatigue strength of aluminum alloy by laser peening

• KOGISHI Yuta

  Yokohama National University

• TAKAHASHI Koji

  Yokohama National University

• SUMIYA Rie

  Toshiba Energy Systems & Solutions Corporation

• CHIDA Itaru

  Toshiba Energy Systems & Solutions Corporation

Bibliographic Information

Other Title

• レーザピーニングによるアルミニウム合金の疲労強度改善

Abstract

The effects of laser peening on the fatigue strength of A2024-T3 were investigated. Plane bending fatigue tests were conducted using test specimens treated with laser peening (LP) and shot peening (SP). In addition, surface roughness and residual stress distribution were measured and fracture surface was observed to evaluate the experimental results. As a result, it became clear that the fatigue strength was improved by any peening method. Also, the fatigue strength improvement rate for LP treated specimens were higher than that for SP treated specimens. These results indicated that the depth and magnitude of compressive residual stress are important for improvement of fatigue strength.

Journal

• The Proceedings of Mechanical Engineering Congress, Japan

  The Proceedings of Mechanical Engineering Congress, Japan 2019 (0), J40107P-, 2019

  The Japan Society of Mechanical Engineers

Keywords

• Laser peening
• Shot peening
• Residual stress
• Aluminum alloy
• Fatigue strength
• Fracture surface

Details

• CRID: 1390002184886463360
• NII Article ID: 130007816623
• DOI: 10.1299/jsmemecj.2019.j40107p
• ISSN: 24242667
• Web Site: https://www.jstage.jst.go.jp/article/jsmemecj/2019/0/2019_J40107P/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed