Influence of peening on the corrosion properties of AISI 304 stainless steel |
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| Authors: | Han-sang Lee Doo-soo Kim Jine-sung Jung Young-shik Pyoun Keesam Shin |
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| Affiliation: | aKorea Electric Power Research Institute, Advanced Materials Group, Daejeon 305-308, Republic of Korea;bSunMoon University, Department of Mechanical Engineering, Asan 336-708, Republic of Korea;cChangwon National University, School of Nano & Advanced Materials Engineering, Changwon 641-773, Republic of Korea |
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| Abstract: | ![]()
The effects of peening treatment on the microstructure and corrosion behavior of AISI 304SS were investigated. Shot and ultrasonic peening were performed on the austenitic stainless steel, and peened specimens were compared in terms of microstructure, surface roughness and corrosion resistance. Nano-sized grains, multi-directional mechanical twins and strain-induced martensite were formed on the surfaces, and the volume fraction of strain-induced martensite in the ultrasonically peened specimen was higher than that of the shot-peened specimen. The ultrasonically peened specimen which had smoother surface and contained more strain-induced martensite showed superior general and localized corrosion resistance to the as-received and shot-peened specimens. |
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| Keywords: | A. Stainless steel B. Polarization B. TEM B. XRD C. Effects of strain |
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