Abstract
Dry canisters used in nuclear power plants can be subject to localized corrosion, including stress corrosion cracking. External and residual tensile stress can facilitate the occurrence of stress corrosion cracking. Residual stress can arise from welding and plastic deformation. Mitigation methods of residual stress depend upon the energy used and include laser peening, ultrasonic peening, ultrasonic nanocrystal surface modification, shot peening, or water jet peening. Among these, laser peening technology irradiates a continuous laser beam on the surface of metals and alloys at short intervals to add compressive residual stress as a shock wave is caused. This research studied the effect of laser peening with/without a thin aluminum layer on the corrosion properties of welded 304L stainless steel. The intergranular corrosion rate of the laser-peened specimen was a little faster than the rate of the non-peened specimen. However, laser peening enhanced the polarization properties of the cross-section of 304L stainless steel, while the properties of the surface were reduced by laser peening. This behavior was discussed on the basis of the microstructure and residual stress.
Funder
Andong National University
Subject
General Materials Science
Reference44 articles.
1. Larry, J. (2012). Welding and Metal Fabrication, Delmar Cengage Learning. [3rd ed.].
2. Farnsworth, S.R. (2010). Welding for Dummies, Wiley Publishing. [3rd ed.].
3. Micro-shockwave measurement and evaluation of laser shock peening;Kim;Trans. Korean Soc. Mech. Eng. B,2011
4. The effects of ultrasonic peening on chemical corrosion behavior of aluminum 7075;Amini;Int. J. Adv. Manuf. Technol.,2017
5. Improving surface finish and wear resistance of additive manufactured nickel-titanium by ultrasonic nano-crystal surface modification;Ma;J. Mater. Process. Technol.,2017
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