한국재료학회지 (Korean Journal of Materials Research)

  • 제24권11호
  • /
  • Pages.610-616
  • /
  • 2014
  • /
  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

슈퍼 2상 스테인리스강의 공식에 미치는 R상의 영향

Effect of and R Phase on the Pitting Corrosion in Super Duplex Stainless Steel

  • 이병찬 (한국폴리텍 VII 대학 울산캠퍼스 신소재응용과) ;
  • 오은지 (부경대학교 금속공학과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Lee, Byung-Chan (Dep. of Advanced Material Application, Ulsan Campus of KOREA POLYTECHNIC) ;
  • Oh, Eun-Ji (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kang, Chang-Yong (Dept. of Metallurgical Engineering, Pukyong National University)
  • 투고 : 2014.09.29
  • 심사 : 2014.10.13
  • 발행 : 2014.11.27
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, we investigated the precipitation behavior of the R-phase precipitated at the initial stage of aging and its effect on the pitting corrosion of 25%Cr-7%Ni-4%Mo super duplex stainless steel. The R-phase in super duplex stainless steel was mainly precipitated at the interface of ferrite/austenite phases and inside of the ferrite phase during the initial stage of aging, and it was transformed into the ${\sigma}$-phase with an increase in aging time. The ferrite phase was decomposed into a new austenite phase and ${\sigma}$-phase. The R phase was an intermetallic compound, which represented a lower Ni and higher Mo than the matrix, and also had a higher Mo and Cr concentration than the ${\sigma}$ phase. With an increasing aging time, the pitting potential $E_p$ was increased slowly by the precipitation of the R-phase, and it was then steeply decreased by the precipitation of the ${\sigma}$-phase. The R-phase was decreased the pitting potential, but its effect was smaller than effect of ${\sigma}$-phase.

키워드

참고문헌

  1. F. B. Pickering, Int. Met. Rev., December, 227 (1976).
  2. C. F. G. Baxter and G. R. Warburton, Proc. Int. Conf. Duplex '94, p.18, Glasgow, Scotland, 13-16, November (1994).
  3. J. Charles, Proc. Int. Conf. Duplex '94. Paper KI, Glasgow. Scotland (1994).
  4. S. C. Kim, Z. Zang, Y. Furuya, C. Y. Kang, J. H. Sung, Q. Q. Ni, Y. Watanabe and I. S. Kim, Mat. Trans, 46(7), 1056 (2005).
  5. J. M. Nicholls, Int. Conf. Duplex '94, Paper. KIII, Glasgow, Scotland, 13-16 November (1994).
  6. T. Huhala, J.U. Nilson, A. Wilson and P. Jonson, Int. Conf. Duplex '94, p.43, Glasgow, Scotland, 13-16 November (1994).
  7. T. H. Hwang, J. H. Kim, K. H. Kim, W. J. Moon and C. Y. Kang, Met. Mater. Int., 20(1), 13 (2014). https://doi.org/10.1007/s12540-014-1004-2
  8. B. C. Lee, C. Y. Kang, Kor. J. Mater. Res., 24(8), 401(2014). https://doi.org/10.3740/MRSK.2014.24.8.401
  9. W. Namgung, C. Y. Kang, J. of Ocean Engineering and Technology, 27(2), 2287(2013).
  10. J. Cui, I. S. Park, C. Y. Kang and K. Miyahara, ISIJ International, 41(2), 192(2001). https://doi.org/10.2355/isijinternational.41.192
  11. J. O. Nilson, Mater, Sci. Tech., 7, 853(1991). https://doi.org/10.1179/mst.1991.7.9.853
  12. F. Tehovnic. et al., Materials and Technology, 45(4), 339(2011).
  13. N. Erahimi et al, Corrosion Sci., 453, 1278 (2011).
  14. L. Karlsson et al, Welding in the world, 43(5), 20 (1999).
  15. C. J. Park, et al, Corrosion, 61(1), 76 (2005). https://doi.org/10.5006/1.3278163

피인용 문헌

  1. Effect of W Substitution on the Precipitation Behavior of χ and σ Phase in Super Duplex Stainless Steels vol.26, pp.4, 2016, https://doi.org/10.3740/MRSK.2016.26.4.200