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Numerical Simulation of Austempering Heat Treatment of a Ductile Cast Iron

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Abstract

This paper presents a coupled thermo-mechanical-metallurgical formulation to predict the dimensional changes and microstructure of a ductile cast iron part as a consequence of an austempering heat process. To take into account the different complex phenomena which are present in the process, the stress-strain law and plastic evolution equations are defined within the context of the associate rate-independent thermo-plasticity theory. The metallurgical model considers the reverse eutectoid, ausferritic, and martensitic transformations using macro- and micro-models. The resulting model is solved using the finite element method. The performance of this model is evaluated by comparison with experimental results of a dilatometric test. The results indicate that both the experimental evolution of deformation and temperature are well represented by the numerical model.

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Acknowledgments

Adrián D. Boccardo had a doctoral scholarship from CONICET during this research. Luis A. Godoy is a member of the research staff of CONICET. Diego J. Celentano gratefully acknowledges the support of Fondecyt Project 1130404. Patricia M. Dardati was supported by a grant from UTN.

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Authors and Affiliations

  1. Department of Mechanical Engineering-GIDMA, Facultad Regional Córdoba, Universidad Tecnológica Nacional, Maestro M. Lopez esq. Cruz Roja Argentina, Córdoba, Argentina

    Adrián D. Boccardo & Patricia M. Dardati

  2. Department of Mechanical and Metallurgical Engineering, Pontificia Universidad Católica de Chile, Research Center for Nanotechnology and Advanced Materials (CIEN-UC), Vicuña Mackenna 4860, Santiago de Chile, Chile

    Diego J. Celentano

  3. Institute for Advanced Studies in Engineering and Technology, CONICET-Universidad Nacional de Córdoba, FCEFyN, Vélez Sarsfield 1611, Córdoba, Argentina

    Luis A. Godoy

  4. Department of Engineering of Cast Alloys and Composites, Faculty of Foundry Engineering, AGH University of Science and Technology, Reymonta 23, Kraków, Poland

    Marcin Górny & Edward Tyrała

Authors
  1. Adrián D. Boccardo
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  2. Patricia M. Dardati
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  3. Diego J. Celentano
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  4. Luis A. Godoy
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  5. Marcin Górny
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  6. Edward Tyrała
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Corresponding author

Correspondence to Adrián D. Boccardo.

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Manuscript submitted July 17, 2015

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Boccardo, A.D., Dardati, P.M., Celentano, D.J. et al. Numerical Simulation of Austempering Heat Treatment of a Ductile Cast Iron. Metall Mater Trans B 47, 566–575 (2016). https://doi.org/10.1007/s11663-015-0511-y

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