Dresden 2014 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MM: Fachverband Metall- und Materialphysik

MM 26: Computational Materials Modelling IV - Phase transitions II

MM 26.5: Talk

Tuesday, April 1, 2014, 12:45–13:00, IFW D

Phase-field simulation of the peritectic reaction in Al-Cu-Ni alloys — •Julia Kundin, Heike Emmerich, and Evgeny Pogorelov — University Bayreuth

The simulations of the solidification of ternary Al-Cu-Ni alloys were carried out by means of a general multi- phase-field model for an arbitrary number of phases. A realistic microstructure can be generated by coupling the real thermodynamic parameters of the phases and the evolution equations. The stability requirements for the model functions on every dual interface guarantee the absence of "ghost" phases on them. The thermal noise terms disturb the stability and can produce the heterogeneous nucleation of product phases in accordance to the energetic conditions. It is shown that the model can produce the growth of the combined eutectic-like and peritectic-like structure in various alloys. Of particular interest is the heterogeneous nucleation of the fourth phase in triple points.