For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Thermo-Mechanical Fatigue of Grey Cast Iron for Cylinder Heads - Effect of Niobium, Molybdenum and Solidification Time
p.377
High Temperature Strength of Cast Irons for Cylinder Heads
p.385
Oxidation Resistant Cast Iron for High Temperature Application
p.393
Effect of C Content on High Temperature Erosive Wear Characteristics of Fe-Based V Containing Multi-Component Cast Steel with Ni
p.400
Prediction of Shrinkage Defects in Iron Castings Using a Microporosity Model
p.411
Modelling Approach and Challenges in Simulating Dross Formation in Ductile Iron Castings
p.419
Three-Dimensional Microstructural Characterization of Cast Iron Alloys for Numerical Analyses
p.427
Solidification Chronology of the Metal Matrix and a Study of Conditions for Micropore Formation in Cast Irons Using EPMA and FTA
p.436
Mathematical Characterization of the Tensile Deformation Curve of Cast Iron Materials
p.444

Prediction of Shrinkage Defects in Iron Castings Using a Microporosity Model

Article Preview

Abstract:

A numerical model for prediction of shrinkage defects in iron castings has been developed. The model is based on gas pores evolution during solidification. It describes the evolution of gas concentration using mass conservation, and the change in melt pressure due to solidification contraction using Darcy’s equation, with mixture continuity assumption in the liquid and the mushy zone. Gas pores nucleation has been calculated using the partial pressure of gas obtained from Sievert’s law. The growth of porosity has been estimated using an equation based upon the total melt pressure on the pore, concentration and temperature of the gas. The porosity model was calibrated against literature data for microporosity, and then applied to the prediction of shrinkage defects in a ductile iron casting. Comparison between the model predictions and experimental measurements indicated that the porosity model can be applied not only to the prediction of micro-shrinkage but also to that of macro-shrinkage. Existing shrinkage prediction models based upon thermal models, such as Niyama criterion and the modulus of retained melt in mushy regions cannot predict correctly both micro- and macro-shrinkage.

By email View Pdf
You have full access to the following eBook
Science and Processing of Cast Iron XI Read eBook

Info:

Periodical:

Materials Science Forum (Volume 925)

Pages:

411-418

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.925.411

Citation:

Cite this paper

Online since:

June 2018

Authors:

Sung Bin Kim*, Young Hoon Yim, Joong Mook Yoon, Doru Michael Ştefănescu

Keywords:

Cast Iron, Macro Shrinkage, Micro Shrinkage, Microporosity Formation, Nucleation of Gas

Export:

RIS, BibTeX

Permissions:

Creative Commons CC BY 4.0

Share:

Citation:

* - Corresponding Author

References

[1] T.S. Piwonka, M.C. Flemings: Trans. AIME, Vol. 236 (1966) pp.1157-1165.

Google Scholar

[2] K. Kubo, R.D. Pehlke: Metallurgical Trans. B, Vol. 16B(2) (1985) pp.359-366.

Google Scholar

[3] P.D. Lee, A. Chirazi, D. See: J. Light Metals, Vol. 1 (2001) pp.15-30.

Google Scholar

[4] D.M. Stefanescu, Int. J. Cast Metals Res. Vol. 18(3) (2005) pp.129-143.

Google Scholar

[5] E. Niyama, T. Uchida, M. Morikawa, S. Saito: AFS Cast Met. Res. J., Vol. 7 (1982) pp.52-63.

Google Scholar

[6] A.S. Sabau and S. Viswanathan: Metall. Mater. Trans. B, Vol. 33B (2002) pp.243-255.

Google Scholar

[7] P.K. Sung, D.R. Poirier, S.D. Felicelli: Modelling Simul. Mater. Sci. Eng., Vol. 10 (2002) pp.551-568.

DOI: 10.1088/0965-0393/10/5/306

Google Scholar

[8] C. Pequet, M. Gremaud, M. Rappaz: Metall. Mater. Trans. A, Vol. 33A (2002) pp.2095-2106.

Google Scholar

[9] A.V. Catalina, J.F. Leon-Torres, D.M. Stefanescu, M.L Johnson: in Solidification Processing 2007, ed. H. Johnes, Sheffield, The Univ. of Sheffield, (2007) pp.699-703.

Google Scholar

[10] V. Khalajzadeh, K.D. Carlson, D.G. Backman, C. Beckermann, Metall. Mater. Trans A, 48A (2017), 1797-1816.

Google Scholar

[11] D.M. Stefanescu, A.V. Catalina: Int. J. Cast Metals Res. 24(3/4) (2011), 144-150.

Google Scholar

[12] E.F. Fisher, E.L. Roy, AFS Trans., 76 (1968), 237-290.

Google Scholar

[13] E.L. Roy, AFS Trans., 101 (1993), 961.

Google Scholar

[14] N. Roy, A.M. Samuel, F.H. Samuel: Met. Mater. Trans., 27A (1996), 415.

Google Scholar

[15] J. Campbell, in Modeling of Casting, Welding and Adv. Solidif. Proc. X, ed. D.M. Stefanescu et al., TMS, Warrendale, PA, (2003), 209-219.

Google Scholar

[16] A.V. Catalina, C.A. Monroe: in Modeling of Casting, Welding and Adv. Solidif. Proc. XIII, IOP Conf. Series: Materials Science and Engineering, 33 (2012) 012067.

Google Scholar

[17] S.B. Kim, Y.H. Yim, J.M. Yoon, S.H. Ahn, J.S. Baek, in: Proceedings of the 72nd World Foundry Congress, 21-25th May 2016, Nagoya, Japan.

Google Scholar

[18] S. Chang, D.M. Stefanescu: Acta. mater. 44(6) (1996), 2221-2235.

Google Scholar

[19] C.J. Vreeman et al.: Int. J. Heat & Mass Transfer, 43 (2000), 677.

Google Scholar

[20] J.D. Zhu, S.L. Cockcroft, D.M. Maijer: Metall. Mater. Trans. A, 37 (2006), 1075-1085.

Google Scholar

[21] P.K. Sung, et al.: J. Crystal Growth, 226 (2001), 363-377.

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.