열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제27권3호
  • /
  • Pages.121-126
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  • 2014
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지
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오스테나이트계 Fe-18Mn-18Cr-0.61N 고질소강의 인장 및 충격 특성에 미치는 냉간 가공의 영향

Effect of Cold Working on Tensile and Charpy Impact Properties of a High-Nitrogen Fe-18Mn-18Cr-0.61N Austenitic Steel

  • 이승용 (서울과학기술대학교 신소재공학과) ;
  • 이상인 (서울과학기술대학교 신소재공학과) ;
  • 황병철 (서울과학기술대학교 신소재공학과)
  • Lee, S.Y. (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, S.I. (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Hwang, B. (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 투고 : 2014.02.27
  • 심사 : 2014.03.12
  • 발행 : 2014.05.30
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초록

High-nitrogen Fe-18Mn-18Cr-N austenitic steels with higher yield strength have been recently developed and used for generator retaining rings because they have non-magnetic, high strength, high ductility, and good corrosion resistance. In the present study, a high-nitrogen Fe-18Mn-18Cr-0.61N austenitic steel was fabricated and then tensile and Charpy impact tests were conducted on them in order to investigate the effect of cold working on the mechanical properties. Although the yield and tensile strengths usually increased with cold working, the ductility and impact toughness significantly decreased after cold working. On the other hand, the high-nitrogen austenitic steel exhibited a ductile-brittle transition due to unusual brittle fracture at low temperatures despite having a face-centered cubic structure. The ductile-brittle transition temperature obtained from Charpy impact tests could be remarkably increased by $60^{\circ}C$ after 20% cold working because of the enhanced cleavage-like brittle fracture.

키워드

참고문헌

  1. P. J. Uggowitzer and M. Harzenmoser : in Proc. Conf. High Nitrogen Steels (Lille, France, 1988), eds. J. Foct, A. Hendry (The Institute of Metals, London, 1989) p. 174.
  2. V. G. Gavriljuk and H. Berns : High Nitrogen Steels, Springer, Berlin (1999).
  3. M. O. Speidel, C. Kowanda, and M. Diener : HNS 2003 (High Nitrogen Steels), Schaffhausen, Switzerland, Institute of Metallurgy, ETH, Zurich (2003).
  4. N. Akdut, B. C. De Cooman, J. Foct, Proc. 7th Int. Conf. High Nitrogen Steels, GRIPS media, Ostend, Belgium (2004).
  5. K. Orita, Y. Ikeda, T. Iwadate and J. Ishizaka : ISIJ Int., 30 (1990) 587. https://doi.org/10.2355/isijinternational.30.587
  6. Material Specification B50A743, General Electric Power Generation Engineering, Schenectady, NY (1981).
  7. Process Specification P14A-AL-0201, General Electric Power Generation Engineering, Schenectady, NY (1987).
  8. R. W. Hertzberg : Deformation and Fracture Mechanics of Engineering Materials, 4th ed., John Wiley & Sons, Inc., 1996.
  9. J. D. Defilippi, K. G. Brickner and E. M. Gilbert : Trans. Metall. Soc. AIME, 245 (1969) 2141.
  10. R. L. Tobler and D. Meyn : Metall. Trans., 19A (1988) 1626.
  11. P. Mullner, C. Solenthaler, P. J. Uggowitzer and M. O. Speidel : Acta Metall. Mater., 42 (1994) 2211. https://doi.org/10.1016/0956-7151(94)90300-X
  12. Y. Tomota, Y. Xia and K. Inoue : Acta Mater., 46 (1998) 1577. https://doi.org/10.1016/S1359-6454(97)00350-9
  13. B. Hwang, T. -H. Lee, S. -J. Park, C. -S. Oh and S. -J. Kim : Mater. Sci. Eng., A137 (1991) 141.
  14. L. P. Karjalainen, T. Taulavuori, M. Sellman and A. Kyrolainen : Steel Res. Int., 79 (2008) 404. https://doi.org/10.1002/srin.200806146

피인용 문헌

  1. Influence of Heat Treatment on Mechanical Properties for Cold Worked 304 Austenitic Stainless Steel vol.56, pp.7, 2018, https://doi.org/10.3365/KJMM.2018.56.7.490