Study on the Effect of Compressive Residual Stress on Fracture Toughness of Spring Steel

Abstract:

Recently, the steel parts used at the aerospace and automobile industries are required to be used lightweight parts. Therefore, used material steel have to be a high stress, which is an indispensable condition in this field. At the consideration of parts design, high hardness of the lightweight parts have an benefit of saving fuel and material. A high stress of metal has a point of difference according to the shape of design, external cyclic load and condition of vibration. Fatigue failure phenomena, which happen in metal, bring on danger in human life and property. Therefore, antifatigue failure technology take an important part of current industries. Currently, the shot peening is used for removing the defect from the surface of steel and improving the fatigue strength on surface. Therefore, this paper was investigated the effect on fracture toughness using shot peening which is improve the resistance of crack growth and crack expansion rate by fatigue that make a compressive residual stress on surface.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 2423-2428
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.2423
• Online since: November 2005
• Authors: Sunchul Huh, Won Jo Park, Sung Ho Park, Su Hyoung Lee
• Keywords: Cleavage Fracture, Compressive Residual Stress, Fracture Toughness (K_IC), Shot Peening, Spring Steel, Surface Roughness (SR)

References

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[2] D. Kirt and M. Jarrett: Influence of shot peening on fatigue and c. orrosion fatigue behavior of structural steel, proc. Of the 4 th International Conference on Shot Peening Vol. 1 (Tokyo 1990), pp.133-142.

DOI: 10.1002/3527606580.ch68

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