Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Effect of serrated grain boundary on stress corrosion cracking of Alloy 600

  • Kim, H.P. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Choi, M.J. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Kim, S.W. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Kim, D.J. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Lim, Y.S. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Hwang, S.S. (Nuclear Materials Research Division, Korea Atomic Energy Research Institute)
  • Received : 2018.03.25
  • Accepted : 2018.05.29
  • Published : 2018.10.25
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Abstract

The effect of a serrated grain boundary on stress corrosion cracking (SCC) of Alloy 600 was investigated in terms of improvement of SCC resistance. Serrated grain boundaries and straight grain boundaries were obtained by controlled heat treatment. SCC cracks preferentially initiated and grew at grain boundaries normal to the tensile loading axis. Resolved tensile stress normal to the grain boundary was lower in serrated grain boundaries compared to straight grain boundaries. The specimen with serrated grain boundaries showed higher SCC resistance than that with straight grain boundaries due to a lower resolved tensile stress normal to the grain boundary.

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References

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