Abstract
Ductile irons are still important engineering materials due to their high strength and toughness, and relatively low price. In the foundries, ductile irons suffer from shrinkage porosity formation during solidification, which is detrimental to the mechanical properties. In order to minimize porosity formation, large risers are normally used in the design, which reduces porosity level sometimes but leads to a low yield. In order to better understand the shrinkage behavior of ductile iron during solidification, a micro model was developed to simulate the microstructure formation. The density change during solidification and the room temperature mechanical properties can be calculated based on the microstructure. The simulation has been compared with the experimental results and found to be in good agreement.
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D.M. Stefanescu (2005) Materials Science and Engineering A, V413–414, 322–333
W. Oldfield (1966) ASM Trans. 59, 945
D.M. Stefanescu, S. Trufinescu (1974) Z. Metall., 9, 610
H. Fredriksson and L. Svensson, Computer Simulation of Structure Formation and Segregation During the Solidification of Cast Iron, The Physical Metallurgy of Cast Iron, H. Fredriksson and M. Hillert, Eds., Elsevier, 1985, p 273–284
H. Fredriksson, L. Svensson (1988) Simulation of Grey Cast-Iron Solidification in a Shaped Casting. D.M. Stefanescu, G.J. Abbaschian, R.J. Bayuzick (Eds.), Solidification Processing of Eutectic Alloys. The Metallurgical Soc., Warrendale, PA, pp. 153–162
D.M. Stefanescu, C. Kanetkar (1985) Computer Modeling of the Solidification of Eutectic Alloys: The Case of Cast Iron. D.J. Srolovitz (Ed.), Computer Simulation of Microstructural Evolution. the Metallurgical Soc., Warrendale, PA, pp. 171–188
J. Lacaze, M. Castro, C. Selig, G. Lesoult (1991) Solidification of Spheroidal Graphite Cast Irons. M. Rappaz et al. (Eds.), Modeling of Casting, Welding and Advanced Solidification Processes V. The Metallurgical Soc., Warrendale, PA, pp. 473–478
E. Fras, W. Kapturkiewicz, A.A. Burbielko (1995) Micro-Macro Modeling of Casting Solidification Controlled By Transient Diffusion and Undercooling. M. Croos, J. Campbell (Eds.), Modeling of Casting, Welding and Advanced Solidification Processes VII. The Metallurgical Soc., Warrendale, PA, pp. 679–686
K.C. Su, I. Ohnaka, I. Yamauchhi, and T. Fukusako, Modelling of Solidified Structure of Castings, The Physical Metallurgy of Cast Iron, H. Fredriksson and M. Hillert, Eds., Elsevier, 1985, p 181–189
S. Chang, D. Shangguan, D.M. Stefanescu (1991) Metall. Trans. 22A, 915
D.M. Stefanescu and C.S. Kanetkar, Computer Modeling of the Solidification of Eutectic Alloys: Comparison of Various Models for Eutectic Growth of Cast Iron, AFS Trans., 1987, p 139–144
L. Nastac, D. M. Stefanescu (1995) AFS Trans., 103, 329–337
D.M. Stefanescu, A. Catalina, X. Guo, L. Chuzhoy, M.A. Pershing, and G. L. Biltgen, Solidification Processing 1997, J. Beech and H. Jones, Eds., University of Sheffield, UK, 7–9 July 1997, p 609–613
G. Lesoult, M. Castro, J. Lacaze (1998) Acta Mater., 46(3), 983–995
G. Lesoult, M. Castro, J. Lacaze (1998) Acta Mater., 46(3), 997–1010
F.J. Bradley (1990) Metall. Trans. B., 24B, 539
R. Vijayaraghavan, F.J. Bradley (1999) Scripta Materialia, 41(11), 1247–1253
D. Venugopalan (1990) Metall. Trans. A, 21A, 913–918
L. Nastac, D.M. Stefanescu (1995) AFS Trans., 103, 329–337
Q. Chen, E.W. Langer, P.N. Hansen (1995) Scand. J. Metall., 24, 48–62
M.I. Onsoien, O. Grong, O. Gundersen, T. Skaland (1999) Metallurgical and Materials Transactions A, 30A, 1053–1068
M.I. Onsoien, O. Grong, O. Gundersen, T. Skaland (1999) Metallurgical and Materials Transactions A, 30A, 1069–1079
N. Saunders and A.P. Miodownik, CALPHAD: Calculation of Phase Diagrams A Comprehensive Guide. Pergamon, 1998
N. Saunders, X. Li, A.P. Miodownik, and J.P. Schille, Modeling of the Thermo-Physical and Physical Properties for Solidification of Al-Alloys, MS Light Met., 2003, p 999–1004
D. Raabe, Computational Materials Science: The Simulation of Materials Microstructure and Properties. Wiley-VCH, 2002
V. Krutiš and J. Roučka, Shrinkage of Graphitic Cast Irons. ESI Group Internal Report
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Guo, J., Samonds, M.T. Modeling and Experimental Validation of Ductile Iron Castings During Solidification. J. of Materi Eng and Perform 17, 831–837 (2008). https://doi.org/10.1007/s11665-008-9246-0
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DOI: https://doi.org/10.1007/s11665-008-9246-0