Characterization of the roundness degree of graphite nodules in ductile iron: A new discrete measure independent to resolution
Vol. 26 No. 2 (2013), Research Papers
Vol. 26 No. 2 (2013)

Characterization of the roundness degree of graphite nodules in ductile iron: A new discrete measure independent to resolution

Research Papers
Published 2013-06-15
A. M. Herrera Navarro
Facultad de Informática, Universidad Autónoma de Querétaro
H. Jiménez Hernández
Centro de Ingeniería y Desarrollo Industrial
H. Peregrina Barreto
Laboratorio de Investigación en control Reconfigurable
F. Manríquez Guerrero
Centro de Investigación y Desarrollo Tecnológico en Electroquímica
I. R. Terol Villalobos
Centro de Investigación y Desarrollo Tecnológico en Electroquímica
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Keywords

Nodules
Roundness
Shape
Probability density function
Mode

How to Cite

Herrera Navarro, A. M., Jiménez Hernández, H., Peregrina Barreto, H., Manríquez Guerrero, F., & Terol Villalobos, I. R. (2013). Characterization of the roundness degree of graphite nodules in ductile iron: A new discrete measure independent to resolution. Superficies Y Vacío, 26(2), 58-63. Retrieved from https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/170
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Abstract

The morphology of graphite nodules in ductile iron, currently controlled by means of chemical inoculants and solidifi cation process, is strongly related to mechanical properties of this material. In fact, the quality of the ductile iron is better when the shape of the graphite particles is rounded. In this article, a new discrete method to measure and to characterize the roundness degree of graphite particles is proposed. This measure takes into consideration the dominant geometry of the nodules and avoids the use of parameters such as area, perimeter and Ferret’s diameter which differs among the systems. In order to show the performance of this measure, it is compared with three measures: Roundness factor, the mean roundness and radius ratio. After comparing with these measures, it was observed that the proposed measure is not affected by the abrupt changes in the contours nor by the shape resolution.
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References

. T. Skaland, O. Grong, T. Grong, J. Metall Trans A, 24, 2347, (1993).

. F. Iacoviello, V. Di Cocco, In proceedings of International Conference on Fatigue Crack Paths. September Parma-Italy, 116, 18, (2003).

. T. Xin, Z. Hong, R. Lu-quan, Z. Zhi-hui, C. Ren-doing, International Journal of Fatigue 31, 668, (2009).

. F. Nabil, A. Aly, S. Moenes, Mater. Sci. Eng. A, 504, 81, (2009).

. R.C. Dommarco, A.J. Jaureguilberry, J.A. Sikora, Wear, 261, 172, (2006).

. American Society for Testing and Materials. ASTM A247. Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings.

. J. Li, L. Lu, M.O. Lai, Mater. Charact., 45, 83, (2000).

. S. H. Pudale, R. J. Rogers, G. R. Nadkarni, AFS Trans., 98, 98, (1998).

. J. Ohser, K. Sandau, W. Stets, W. Gerber, Practical Metallographic, 40, 454, (2003).

. B.I. Imasogie and U. Wendt, Journal of Minerals & Materials Characterization & Engineering, 3, 1, (2004).

. A. De Santis, O. Di Bartolomeo, D. Iacoviello, F. Iacoviello, J. Mater, Proc. Technol. 196, 292, (2008).

. L.A. Morales-Hernández, I.R. Terol-Villalobos, A. Domínguez, F. Manriquez, G. Herrera-Ruíz, J. Mater. Proc. Technol., 210, 335, (2009).

. D.W. Hetzner, Microscopy Today, 10 (2008).

. N, Ritter, J. Cooper, J. Math Imaging Vis., 35, 117, (2009).

. R.E. Ruxanda, D.M. Stefanescu, T.S. Piwonka, AFS Trans., 110, 1131, (2002).