Multispot laser peening using phase modulated laser beam

Megat Adam Bin Megat Harris; Natsuki Furukawa; Miho Tsuyama; Manabu Heya; Hitoshi Nakano

doi:10.1117/12.3029855

8 November 2024 Multispot laser peening using phase modulated laser beam

Megat Adam Bin Megat Harris, Natsuki Furukawa, Miho Tsuyama, Manabu Heya, Hitoshi Nakano

Author Affiliations +

Proceedings Volume 13234, Advanced Laser Processing and Manufacturing VIII; 132340O (2024) https://doi.org/10.1117/12.3029855
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

Multispot laser peening was conducted on austenitic stainless steel (SUS316L) using a Nd:YAG laser as the laser source to generate a high-intensity pulse ranging from 0.5–4 GW/cm². A liquid-crystal-on-silicon spatial light modulator (LCOS-SLM) was used for laser division to create multiple spots on the target. Multiple laser pulses irradiating a metal surface simultaneously induce multiple shock waves. This approach leads to a thicker plastically deformed layer compared with laser-induced shock waves produced by a single pulse. The laser peening performance was evaluated by measuring the magnitude of the compressive residual stress, hardness difference, and magnitude of the laser-induced shock wave. The laser intensity and laser irradiation patterns were adapted as the laser peening parameters throughout the experiment.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Megat Adam Bin Megat Harris, Natsuki Furukawa, Miho Tsuyama, Manabu Heya, and Hitoshi Nakano "Multispot laser peening using phase modulated laser beam", Proc. SPIE 13234, Advanced Laser Processing and Manufacturing VIII, 132340O (8 November 2024); https://doi.org/10.1117/12.3029855

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