Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Application of Coating Technique for Measurement of Elevated Temperature Fatigue Crack Growth Behavior

고온 피로균열 성장거동 관찰을 위한 코팅기술의 응용

  • 남승훈 (한국표준과학연구원 산업측정표준부) ;
  • 김용일 (한국표준과학연구원 물질량표준부) ;
  • 서창민 (경북대학교 기계공학부) ;
  • 김동석 (삼익정공(주) 기술연구소)
  • Published : 2002.04.01
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Abstract

The remote measurement system(RMS) as a new experimental method is limited in its application to crack measurement at elevated temperatures because of the oxide layer on the specimen surface. Since TiAIN and Cr coating layers have a high resistance to oxidation and wear, this paper proposed a TiAIN and Cr coating technique for specimens to facilitate the measurement of crack growth behavior using RMS. To investigate the effects of the coating layer, tension and fatigue tests were carried out at room temperature and at $538^{\circ}C$. The test material was 1Cr-1Mo-0.25V steel which is widely used as a turbine rotor material. From the experimental results, it was found that the mechanical properties of the TiAIN and Cr coated specimens were similar to those of the substrate. Accordingly, the TiAIN and Cr coated layer had hardly any influence on the fatigue crack propagation.

Keywords

References

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