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21 December 2022 Improvement of residual stress on metal surface and fatigue properties by laser peening with microchip laser mounted on robotic arm
Yoshio Mizuta, Satoshi Tamaki, Kiyotaka Masaki, Tomoharu Kato, Yoshihiro Sakino, Tomonao Hosokai, Yuji Sano
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Proceedings Volume 12312, Advanced Laser Processing and Manufacturing VI; 123120H (2022) https://doi.org/10.1117/12.2644048
Event: SPIE/COS Photonics Asia, 2022, Online Only
Abstract
A portable and compact laser peening (LP) device was developed to apply LP to infrastructure maintenance. LP treatment of metal materials was performed by this device, and residual stress measurements and fatigue tests were conducted. Even at a pulse energy of less than 10 mJ, compressive residual stress was imparted in a near surface layer of high strength steel (HT780) and aluminum alloy (A7075) to a depth of 0.2 mm and 0.5 mm respectively. The fatigue properties of the materials were also improved.
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Yoshio Mizuta, Satoshi Tamaki, Kiyotaka Masaki, Tomoharu Kato, Yoshihiro Sakino, Tomonao Hosokai, and Yuji Sano "Improvement of residual stress on metal surface and fatigue properties by laser peening with microchip laser mounted on robotic arm", Proc. SPIE 12312, Advanced Laser Processing and Manufacturing VI, 123120H (21 December 2022); https://doi.org/10.1117/12.2644048
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KEYWORDS
Metals
Robotics
Corrosion
High power lasers
Laser development
Pulsed laser operation
Bridges
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