Enhancement of Surface Property by Low-Energy Laser Peening without Protective Coating

Yuji Sano; T. Adachi; Koichi Akita; I. Altenberger; M.A. Cherif; Berthold Scholtes; Kiyotaka Masaki; Yasuo Ochi; Tatsuo Inoue

doi:10.4028/www.scientific.net/KEM.345-346.1589

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The Main Effect of Design Variables for a Safety Valve on a Fracture Pressure
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Electromagnetic Wave Shielding Properties of ITO/PET Thin Film by Film Thickness
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Enhancement of Surface Property by Low-Energy Laser Peening without Protective Coating
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 345-346Enhancement of Surface Property by Low-Energy...

Enhancement of Surface Property by Low-Energy Laser Peening without Protective Coating

Abstract:

Laser peening without protective coating (LPwC) has been applied to metallic materials using low energy pulses of a Q-switched and frequency-doubled Nd:YAG laser. Compressive residual stresses of several hundred megapascals were imparted on the surface of the materials. Redistribution of the residual stress in the top surface due to thermal loading was evaluated non-destructively by synchrotron radiation of SPring-8. Accelerating stress corrosion cracking (SCC) tests showed that LPwC prohibited SCC of sensitized materials. LPwC largely prolonged the fatigue lives of titanium alloys, aluminum alloys and austenitic stainless steels.

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Periodical:

Key Engineering Materials (Volumes 345-346)

Pages:

1589-1592

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.345-346.1589

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Online since:

August 2007

Authors:

Yuji Sano, T. Adachi, Koichi Akita, I. Altenberger, M.A. Cherif, Berthold Scholtes, Kiyotaka Masaki, Yasuo Ochi, Tatsuo Inoue

Keywords:

Fatigue, Laser Peening, Residual Stress, Stress Corrosion Cracking (SCC), Thermal Stability

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