Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Detection of Low Cycle Fatigue in Type 316 Stainless Steel using HTS-SQUID

  • Park, D.G. (Korea Atomic Energy Research Institute) ;
  • Kim, D.W. (Korea Atomic Energy Research Institute) ;
  • Timofeev, V.P. (Verkin Institate for Low Temperature Physics & Eng.) ;
  • Hong, J.H. (Korea Atomic Energy Research Institute)
  • Published : 2004.10.01
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Abstract

A portable RF HTS SQUID-based susceptometer was applied to the measurement of fatigue behavior for type 316L(N) stainless steel containing 0.04% to 0.15% nitrogen content. Strain-controlled low cycle fatigue (LCF) tests were conducted at RT and $600^{\circ}C$ in air an atmosphere, and the magnetic moments were measured after the fatigue test using HTS SQUID. The magnetic moment of an as-received sample is higher than that of a fatigued sample in all the temperature ranges irrespective of the nitrogen content. The fatigue life decreased with an increasing test temperature up to $500^{\circ}C$, but increased at $600^{\circ}C$. The change of the magnetic moments by LCF test is attributed to the stress induced micro defects.

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References

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