Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
Boccardo A.D., Dardali P.M., Celentano D.J., Godoy L.A., Gorny M. and Tyrala E. (2016)

Numerical Simulation of Austempering Heat Treatment of a Ductile Cast Iron

Revista : Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science
Volumen : 47
Número : 1
Páginas : 566-575
Tipo de publicación : ISI Ir a publicación


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