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Influence of Shot Peening on the Corrosion of Spring Steel  

HA KYUNG-JUN (School of Mechanical Engineering, Pukyong National University)
PARK KYUNG-DONG (School of Mechanical Engineering, Pukyong National University)
Publication Information
Journal of Ocean Engineering and Technology / v.17, no.3, 2003 , pp. 39-45 More about this Journal
Abstract
Shot peening is an effective method of improving the fatigue strength of components and structures. The compressive residual stress produced by surface plastic deformation with shot peening is usually regarded as the major factor in increasing fatigue strength. In this study, the influence of shot peening on corrosion was investigated. Spring steel immersed in $3.5\%$ NaCl prior was used to evaluate the effect of shot peening on fatigue properties. The immersion test was performed on the five kinds of specimens with shot peened and unpeened. The distributions of residual stresses of shot peened spring steels were measured in an X-ray diffraction apparatus, using the two-point method. Corrosion potential, polarization curve, residual stress, etc. were investigated, based on the experimental results. From test results, the effect of shot peening on the corrosion was evaluated.
Keywords
Shot Peening 쇼트피닝;Spring Steel 스프링강;Corrosion 부식;Protection 방식;Immersion Test 침지시험;Residual Stress 잔류응력;Polarization Curve 분극곡선;Weight Loss 무게감소;Corrosion Potential 부식전위;
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