Laser peening in a high-vacuum environment

Mai Zhang; Yang Zhang; Miho Tsuyama; Manabu Heya; Hitoshi Nakano

doi:10.1117/12.3030918

8 November 2024 Laser peening in a high-vacuum environment

Mai Zhang, Yang Zhang, Miho Tsuyama, Manabu Heya, Hitoshi Nakano

Author Affiliations +

Proceedings Volume 13234, Advanced Laser Processing and Manufacturing VIII; 132340P (2024) https://doi.org/10.1117/12.3030918
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

Laser peening is a surface-enhancement technique that uses a high intensity of several gigawatts for the cold working of metal samples. The most notable feature of this technique is its effective treatment of the depths of metal samples. A transparent coating, known as a plasma confinement layer, is typically used in laser peening to suppress the expansion of the plasma away from the metal surface. The ability to confine the plasma significantly affects the effectiveness of laser peening. Water is commonly used as a plasma confinement layer due to its transparency, cost-effectiveness, ease of handling, and its ability to conform to the shape of metal as a liquid. However, in high-vacuum environments, only solid-state media can be used as plasma confinement layers. In this study, laser peening was performed in a high-vacuum environment using silicone rubber (polydimethylsiloxane) as the plasma confinement layer. It is softer and conforms to the shape of metal in a vacuum environment. Through experiments, the appropriate process window for laser irradiation was explored by varying the intensity and number of laser shots.

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

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Mai Zhang, Yang Zhang, Miho Tsuyama, Manabu Heya, and Hitoshi Nakano "Laser peening in a high-vacuum environment", Proc. SPIE 13234, Advanced Laser Processing and Manufacturing VIII, 132340P (8 November 2024); https://doi.org/10.1117/12.3030918

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