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Modelling of solidification and heat treatment for the prediction of yield stress of cast alloys

Abstract : A model is developed for the prediction of the microstructure evolution of cast alloys during its industrial process route. The materials under consideration are binary aluminium-copper alloys. The process are casting, homogenising and ageing. A suite of models is built, which successively calculates microsegregation taking place duríng solidification and homogenisation, and precipitation occurring during ageing of the alloy. As a final output, the model permits the final yield stress of the material to be calculated as a function of the process parameters (i.e., casting cooling rate, inoculation of the alloy, duration and temperature of the homogenising and ageing heat treatments). This is made possible by introducing a structural hardening model between the diffusion driven phase transformation models and a final mechanical model for heterogeneous materials.
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Submitted on : Friday, July 28, 2017 - 3:04:34 PM
Last modification on : Thursday, March 25, 2021 - 3:01:40 AM

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Charles-André Gandin, Yves Brechet, Michel Rappaz, Gilles Canova, Michael Ashby, et al.. Modelling of solidification and heat treatment for the prediction of yield stress of cast alloys. La Metallurgia Italiana, Milano: Associazione Italiana di Metallurgia, 2002, pp.37-38. ⟨hal-01570149⟩

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