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| Effect of Solidification Rates on Microstructures and Segregation of IN718 Alloy |
| LI Jia; YU Lianxu; SUN Wenru; ZHANG Weihong; LIU Fang; QI Feng; GUO Shouren; HU Zhuang |
| Institute of Metal Research; Chinese Academy of sciences; Shenyang 110016 |
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Cite this article:
LI Jia YU Lianxu SUN Wenru? ZHANG Weihong LIU Fang QI Feng GUO Shouren HU Zhuang. Effect of Solidification Rates on Microstructures and Segregation of IN718 Alloy. Chin J Mater Res, 2010, 24(2): 118-122.
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Abstract In this paper, the dendritic arm spacings and microsegregation of directionally solidified IN718 alloy at various solidification rates have been studied with a LMC directional solidification equipment. The results show that increasing the solidification rate, the primary dendrite arm spacings rise up to the maximum of 257 μm at 20 μm/s, then decrease, while the second dendritic arm spacings are refined continuously. Additionally, the microsegregation is suppressed and the permeability of mush zone decreases with solidification rate increasing.
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Received: 15 December 2009
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| 1 C.Malara, J.Radavich, Alloy 718 Large Ingots Studies, in: Superalloys 718. 625. 706 and Various Derivatives, E.A.Loria ed., (Pittsburgh, PA: TMS, USA, 2005) p.25
2 S.M.Copley, A.F.Giamei, S.M.Johnson, M.F.Hornbecker, The origin of freckles in unidirectionally solidified casting, Metallurgical Transactions, 1, 2193(1970)
3 W.H.Yang, Keh-Minn Chang, Wei Chen, Sarwan Mannan, John DeBarbadillo, Freckle criteria for the upward directional solidification of alloys, Metallurgical and Materials Transactions A,. 32(2), 397(2001)
4 P.Auburtin, S.L.Cockcroft, A.Mitchell, Liquid density inversion during the solidification of superalloys and their relationship to freckle formation in castings, in: Superalloys, R.D.Kissmger, et al. ed., (Warrendale, PA: TMS, USA, 1996) p.443
5 J.C.Heinrich, D.R.Poirier, Convection modeling in directional solidification, Comptes Rendus Mecanique, 332(5-6), 429(2004)
6 D.R.Poirier, S.Ganesan, Permeabilities for flow of interdendritic liquid in equiaxial structures, Materials Science and Engineering: A, 157(1), 113(1992)
7 YU Yongning, Fundamentals of materials science and engeering, (Beijing, Metallurgical Industry Press, 2003) p.252-257
(余永宁[编], 金属学原理, (北京, 冶金工业出版社, 2003) p.252-257)
8 LIU Zhongyuan, LI Jianguo, FU Hengzhi, Dendritic arm spacing and microsegregation of directionally solidified superalloy DZ22 at various solidification rates, Acta Metallurgica Sinica, 31(7), 229(1995)
(刘忠元, 李建国, 傅恒志, 凝固速率对定向凝固合金DZ22枝晶臂间距和枝晶偏析的影响, 金属学报, 31(7), 229 (1995))
9 A.D.Patel, V.Y.Murty, Effect of Cooling Rate on Microstructural Development, in: Alloy 718. Superalloys 718. 625. 706 and Various Derivatives, E.A. Loria ed., (Warrendale, PA: TMS, USA, 2001) p.123
10 R.G.Santos, M.L.N.M.Melo, Permeability of interdendritic channels, Materials Science and Engineering A, 391(1-2), 151(2005) |
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