The Effect of Residual Stress on Fatigue Crack Growth of Multi-Pass Welds

Seung Gun Lee; Jong Sung Kim; Jin Seok Park; Tae Eun Jin

doi:10.4028/www.scientific.net/KEM.306-308.1325

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 306-308The Effect of Residual Stress on Fatigue Crack...

The Effect of Residual Stress on Fatigue Crack Growth of Multi-Pass Welds

Abstract:

The multi-pass welding generates residual stress which may change fatigue crack growth rate and impair the lifetime of nuclear welded structures. In this paper, we performed fatigue test with notched specimens and evaluate the effect of residual stress on fatigue crack growth rate of welds. In order to identify the magnitude of residual stress, the residual stress was measured by HDM (hole drilling method) and residual stress analysis was performed by using FEM (finite element method). In order to review the effect of residual stress on fatigue crack growth rate, the fatigue crack growth analysis was also performed to determine the fatigue crack growth curves by using FEM and ASME B&PV Code, Sec.XI, App.A. Finally, as a result of comparison among the fatigue crack growth curves, it is found that the fatigue crack growth rate was quite different according to the crack location even if the residual stresses are considered.

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Periodical:

Key Engineering Materials (Volumes 306-308)

Pages:

1325-1330

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.306-308.1325

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Online since:

March 2006

Authors:

Seung Gun Lee, Jong Sung Kim, Jin Seok Park, Tae Eun Jin

Keywords:

Austenite Stainless Steel, Crack Growth Rate (da/dN), Fatigue Crack Growth (FCG), Finite Element Model (FEM), Residual Stress, Stress Intensity Factor (SIF)

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References

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