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MM: Fachverband Metall- und Materialphysik

MM 27: Phase Transformations II

MM 27.2: Talk

Wednesday, March 16, 2011, 14:45–15:00, IFW D

Morphological study of a peritectic Al-Ni alloy by a quantitative phase-field simulation — •Julia Kundin and Heike Emmerich — 1Material and Process Simulation (MPS), University Bayreuth, Germany, Nürnberger str.38(4) 95448 Bayreuth

A phase field model of simulating peritectic and eutectic growth is described, which is applied to the investigation of the peritectic microstructure in an Al-Ni alloy during directional solidification. The presented model is an extension of the multiphase-field approach [I. Steinbach, Physica D 94 (1996), R. Folch and M. Plapp, Phys. Rev. E 72, 011602 (2005)] to study the solidification of multiphase systems based on the real free energy functions. It is shown, that the model is a reliable and powerful numerical approach to simulate the solidification of alloys involving more than one solid phase at nonisothermal conditions. The model is verified on an example of the Al-Ni system for which the morphology of the peritectic structure during the process of the directional solidification is investigated. The proposed model is also extended to multi-component systems.