Authors: Dardati, P. M.¹; Celentano, D. J.²; Godoy, L. A.³; Chiarella, A. A.⁴; Schulz, B. J.⁴

Source: International Journal of Cast Metals Research, Volume 22, Number 5, October 2009 , pp. 390-400(11)

Publisher: Maney Publishing

Abstract:

This paper presents an experimental and numerical study of the solidification process of ductile cast iron under slightly hypereutectic conditions. The material thermo-microstructural behaviour is measured in tests performed using standardized cups. Cooling curves at the centre of the cup were recorded, and metallographic studies were carried out to investigate the number and size of graphite nodules at the end of the process. Different models were tested: a model based on a uninodular theory and two models which represent the multi-nodular theory. The cooling curves predicted by these models are in good agreement with the experimental measurements. Some scatter is found, however, in the numerical–experimental comparison for the graphite nodule density at different points of the sample.

Keywords: DUCTILE IRON; FINITE ELEMENTS; NUMERICAL SIMULATION; MICROSTRUCTURE; SOLIDIFICATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174313309X436646

Affiliations: 1: Departamento de Ingeniería Mecánica – Centro de Investigación en Ingeniería en Informática para la Ingeniería, Facultad Regional Córdoba, Universidad Tecnológica Nacional, M. López y Cruz Roja Argentina, Córdoba, Argentina 2: Departamento de Ingeniería Mecánica y Metalúrgica, Pontificia Universidad Católica de Chile, Santiago, Chile 3: Departamento de Estructuras, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba, Argentina 4: Departamento de Ingeniería Metalúrgica, Universidad de Santiago de Chile (USACH), Av. Bdo. O'Higgins 3363, Santiago, Chile

Publication date: 2009-10-01

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