Femtosecond laser peening of 2024 aluminum alloy without a sacrificial overlay under atmospheric conditions

• Sano, Tomokazu

• Eimura, Takayuki

• Kashiwabara, Ryota

• Matsuda, Tomoki

• Isshiki, Yutaro

• Hirose, Akio

• Tsutsumi, Seiichiro

• Arakawa, Kazuto

• Hashimoto, Tadafumi

• Masaki, Kiyotaka

• Sano, Yuji

Abstract

The authors have successfully performed femtosecond laser peening on a 2024 aluminum alloy without any sacrificial overlays. Laser pulses were directly irradiated to the surface of specimens in the air without water film as a plasma confinement medium during the peening treatment. The fatigue life was improved as much as 38 times in comparison with base material at a stress amplitude of 195 MPa. The fatigue strength of the peened specimen after 2 × 10^6 cycles was 58 MPa larger than that of the base material. The femtosecond laser peening process has a great potential to be applied in various fields where conventional peening methods cannot be used, as this process can be performed under ambient conditions without the use of a plasma confinement medium such as water or transparent materials.

Journal

• Journal of Laser Applications

  Journal of Laser Applications 29 (1), 012005-1-012005-7, 2017-02

  Laser Institute of America

Keywords

• femtosecond laser peening
• femtosecond laser-driven shock wave
• laser peening
• atmospheric conditions
• sacrificial overlay
• 2024 aluminum alloy

Details

• CRID: 1050001338486227840
• NII Article ID: 120006352342
• NII Book ID: AA11040115
• ISSN: 1042346X
• ISSN: 19381387
• DOI: 10.2351/1.4967013
• HANDLE: 11094/89442
• Web Site: http://ir.lib.shimane-u.ac.jp/40622
• Web Site: https://pubs.aip.org/lia/jla/article-pdf/doi/10.2351/1.4967013/15749113/012005_1_online.pdf
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN