[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5916/jkosme.2010.34.5.661

Laser Peening: A Novel Tool to Reduce SCC Susceptibility and Prolong Fatigue Life of Metallic Components

Sano, Yuji (Power and Industrial Systems Research and Development Center, Toshiba Corporation)
Kim, Jong-Do (Department of Marine System Engineering, Korea Maritime University)

Publication Information

Journal of Advanced Marine Engineering and Technology / v.34, no.5, 2010 , pp. 661-669 More about this Journal

Abstract

The effects of laser peening on metallic materials have been investigated with water-penetrable frequency-doubled Nd:YAG laser. Laser pulses of 200 mJ energy and 8 ns duration focused on samples underwater with 0.8 mm spot diameter. X-ray study showed that compressive residual stress was imparted on SKD61 from the surface to nearly 2 mm depth. Stress corrosion cracking (SCC) was prohibited for sensitized SUS304 even in a severely corrosive environment fatigue lives of SUS316L and SM490A welded samples were prolonged significantly in the high-cycle regime. Since 1999, laser peening has been applied to prevent SCC in operating nuclear power plants in Japan.

Keywords

Laser peening; Surface technology; Residual stress; Nuclear power plants;

Citations & Related Records

Reference

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