Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Solution Heat Treatment on Mechanical Properties in Incoloy 825 Alloy

Incoloy 825 합금의 기계적 성질에 미치는 열처리의 영향

  • Park, Y.T. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kim, D.H. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kang, C.Y. (Dept. of Metallurgical Engineering, Pukyong National University)
  • 박영태 (부경대학교 금속공학과) ;
  • 김도훈 (부경대학교 금속공학과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Received : 2017.03.17
  • Accepted : 2017.03.31
  • Published : 2017.05.30
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Abstract

This study was carried out to investigate the effect of heat treatment on the microstructure and mechanical properties in 90% hot forged Incoloy 825 alloy. With increasing solution treatment temperature, the grain size increased and the volume fraction of total precipitates decreased, and the precipitates disappeared at $1,000^{\circ}C$. With increasing aging time at $700^{\circ}C$, the volume fraction of precipitate increased and the precipitates size increased. Most of the precipitates consist $Cr_{23}C_6$ carbide, and a small amount of TiC carbide was also observed. With decreasing solution treatment temperature and increasing aging time, tensile strength and hardness increased, and the elongation and impact value decreased. With increasing aging time, the impact value decreased sharply by the increased of the precipitate size.

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References

  1. E. Grundy : Mater. Sci. Technol., 3 (1987) 782. https://doi.org/10.1179/mst.1987.3.9.782
  2. E. L Raymond : Corrosion-NACE, 24 (1968) 782.
  3. P. L. Ko : ASME Journal of Tribology, 107 (1985) 149. https://doi.org/10.1115/1.3261010
  4. P. S. Kim, H. Y. Kim, S. Y. Choi, Y. S. Kim and J. D. Kim : KOSME, 38 (2014) 698.
  5. Y. T. Park, Y. H. Jeong and C. Y. Kang : J. of the Korean Society for Heat treatment, 29(6) (2016)259. https://doi.org/10.12656/jksht.2016.29.6.259
  6. H. Nahm and J. Moteff : Metal Transactions A, 7 (1976) 1473. https://doi.org/10.1007/BF02658838
  7. M. J. Donachie, Jr. and O. H. Kriege : J. Mater, 7 (1972) 269.
  8. M. A. Shaikh, M. Iqbal, M. Ahmad, J. I. Akhtar and K. A. Shoaib : Journal of Materials Science Letter, 11 (1992) 1009. https://doi.org/10.1007/BF00729911
  9. C. T. Shims, N. S. Stoloff and W. C. Hagel : John Wiley & Sons Pub, SUPERALLOYS, II (1986) 111.
  10. G. H. Kwon, Y. S. Na, W. D. Yoo, J. H. Lee and Y. H. Park : Korean j. Met. Mater. 50(9) (2012) 495. https://doi.org/10.3365/KJMM.2012.50.7.495
  11. C. Y. Kang, S. H. Kim and Y. T. Park : J. of the Kor. Soci. for Power System Engineering, 21(2) (2017) 51.
  12. H. Nahm and J. Moteff : Metal Transactions A, 7A(11) (1976) 1474.
  13. M. J. Donachie, Jr. and O. H. Kriege : J. Mater., 7 (1972) 269-278.
  14. M. A. Shaikh, M. Iqbal, M. Ahad, J. I Akhtar and K. A. Shoai : Journal of Materials Science Letter, 11 (1992) 1009. https://doi.org/10.1007/BF00729911
  15. J. R. Keough, W. J. Larid and A. D. Godding : Heat Treatig, ASM Metals Hndbook, ASM International, 4 (1991) 162.