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Effects of Laser Shock Processing on Corrosion Properties of 304 Stainless Steel

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The surface of 304 stainless steel was processed by laser shock wave, its surface micro-structures were observed with SEM, and residual stresses on its surface were measured with X-ray diffraction (XRD) stress tester, and the production mechanism of residual stress was analyzed. The experiment of stress corrosion in 25% NaCl aqueous solution was finished, the crack sensitivity of stress corrosion in NaCl aqueous solution was researched, and the effects of LSP on stress corrosion resistance were analyzed. The results shown that the refined hardened-layer is acquired on the surface of 304 stainless steel by LSP, and compressive residual stress has greatly increased, which improve availably the performances of stress corrosion resistant. The time of appearing cracks is inverse ratio with compressive residual stress, and LSP decreases effectively its stress corrosion cracks.

laser shock processing304 stainless steelresidual stressstress corrosion

D.J. Kong、H. Miao、A.P. Hu

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College of Mechanical & Energy Engineering, Jiangsu Polytechnic University, Changzhou, 213016, P.R. China

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China

2010

10.4028/www.scientific.net/KEM.426-427.109

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.426/427
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