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

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)
Publication Information
Journal of Korea Foundry Society / v.27, no.2, 2007 , pp. 77-82 More about this Journal
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
Directional superalloy; Directional solidification; Solidification rate; Thermal gradient; Dendrite arm spacing;
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  • Reference
1 B. B. Seth, Superalloys 2000 (eds., T. M. Pollock et al.), TMS, p.3 (2000)
2 C. T. Sims, N. S. Stoloff, W. C. Hagel, SuperalloysII, John Wiley & Sons, p.97 (1987)
3 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)   DOI   ScienceOn
4 F. L. Versnyder and R. W. Guard, Trans. ASM, 52, 485 (1960)
5 J. D. Verhoeven, Fundametals of Physical Metallurgy, John Wiley & Sons, p.257 (1975)
6 S. M. Seo, I. S. Kim, J.H.Lee, C. Y. Jo, K. Oki, Korea Inst. of Metal & Materials, 44(1), 44(2006)
7 M. McLean, Directionally Solidification Material for High Temperature Service, The Metals Society (1983)
8 W. Kurz and D. J. Fisher, Fundamentals of Solidification, Trans Tech Publications, p.83 (1998)
9 ASM Specialty Handbook, Heat-Resistant Materials, ASM Inter. (1977)