Laser Peening without Coating to Mitigate Stress Corrosion Cracking and Fatigue Failure of Welded Components

Yuji Sano; Yoshihiro Sakino; Naruhiko Mukai; Minoru Obata; Itaru Chida; Takuya Uehara; Masaki Yoda; You Chul Kim

doi:10.4028/www.scientific.net/MSF.580-582.519

Paper Titles

Laser-Based Fe-36%Ni (Invar®) Alloy Processing with Deep Microgrooves in Aqueous Solutions
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Development of a LASER Welding Apparatus and a Method for an Inner-Strap Welding of a Spacer Grid Assembly for a PWR Fuel Assembly
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Development of Remote Welding System Using Fiber Laser
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Fatigue Analysis of Stainless Steel Overlap Joining Panel Partially Penetrated by Laser Welding
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Laser Peening without Coating to Mitigate Stress Corrosion Cracking and Fatigue Failure of Welded Components
p.519

Optimization of Welding Conditions for Sealing of Lithium-Ion Battery by Pulsed Nd:YAG Laser
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Advanced Laser Joining by Use of Process Optimizing System Technology
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Laser Joining Applications Highest Efficiency Using Diode Lasers
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Understanding of Laser and Hybrid Welding Phenomena
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Laser Peening without Coating to Mitigate Stress Corrosion Cracking and Fatigue Failure of Welded Components

Abstract:

The authors have applied laser peening without coating (LPwC) to metallic materials. Compressive residual stress nearly equal to the yield strength of the materials was imparted on the surface. Accelerating stress corrosion cracking (SCC) tests showed that LPwC had a significant effect to prevent the SCC initiation of sensitized materials of SUS304, Alloy 600 and the weld metal, Alloy 182. Push-pull type fatigue testing demonstrated that LPwC drastically enhanced the fatigue strength of fillet-welded rib-plates of SM490A.