Browsing by Author "Tyrata, Edward"

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    Numerical simulation of austempering heat treatment of a ductile cast iron
    (The Minerals, Metals & Materials Society and ASM International, 2016) Boccardo, Adrián; Dardati, Patricia; Celentano, Diego; Godoy, Luis; Gorny, Marcin; Tyrata, Edward
    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.