Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

Dendrite Arm Spacing and Carbide Morphology with Thermal Gradient and Solidification Rate in Directionally Solidified Ni-Base Superalloy

일방향 초내열합금에서 응고속도 및 온도구배 따른 수지상간격 및 탄화물 형상 변화

  • Son, S.D. (Dept. of Materials Science and Engineering, Changwon National University) ;
  • Kim, Y.H. (Dept. of Materials Science and Engineering, Changwon National University) ;
  • Choi, G.S. (Dept. of Materials Science and Engineering, Changwon National University) ;
  • Lee, J.H. (Dept. of Materials Science and Engineering, Changwon National University) ;
  • Seo, S.M. (High Temperature Materials Lab., Korea Institute of Machinery and Materials) ;
  • Jo, C.Y. (High Temperature Materials Lab., Korea Institute of Machinery and Materials)
  • 손승덕 (창원대학교 재료공학과) ;
  • 김연희 (창원대학교 재료공학과) ;
  • 최규석 (창원대학교 재료공학과) ;
  • 이재현 (창원대학교 재료공학과) ;
  • 서성문 (한국기계연구원 환경재료연구센터) ;
  • 조창용 (한국기계연구원 환경재료연구센터)
  • Published : 2007.03.20
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of thermal gradient and solidification rate on the dendrite arm spacing and carbide morphology were investigated in directionally solidified Ni-base superalloy, CM 247LC. Thermal gradient was controlled by changing the position of the cold chamber and the furnace set temperature. The interface morphology changed from the planar to dendritic as increasing solidification rate. It was found that the dendrite spacing decreased as increasing the thermal gradient as well as the solidification rate. Also, as increasing solidification rate, carbide morphology changed from blocky shape to script and spotty shapes.

Keywords

References

  1. B. B. Seth, Superalloys 2000 (eds., T. M. Pollock et al.), TMS, p.3 (2000)
  2. ASM Specialty Handbook, Heat-Resistant Materials, ASM Inter. (1977)
  3. C. T. Sims, N. S. Stoloff, W. C. Hagel, SuperalloysII, John Wiley & Sons, p.97 (1987)
  4. J. Chen, J. H. Lee, C. Y. Jo, S. J. Choe, Y. T. Lee, 'A study of MC Carbide Formation in Nickel Base Superalloy', Materials Science and Engineering A, 247,113-125 (1998/6) https://doi.org/10.1016/S0921-5093(97)00761-2
  5. F. L. Versnyder and R. W. Guard, Trans. ASM, 52, 485 (1960)
  6. J. D. Verhoeven, Fundametals of Physical Metallurgy, John Wiley & Sons, p.257 (1975)
  7. S. M. Seo, I. S. Kim, J.H.Lee, C. Y. Jo, K. Oki, Korea Inst. of Metal & Materials, 44(1), 44(2006)
  8. W. Kurz and D. J. Fisher, Fundamentals of Solidification, Trans Tech Publications, p.83 (1998)
  9. M. McLean, Directionally Solidification Material for High Temperature Service, The Metals Society (1983)