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MM: Fachverband Metall- und Materialphysik

MM 26: Computational Materials Modelling IV - Phase transitions II

MM 26.1: Vortrag

Dienstag, 1. April 2014, 11:45–12:00, IFW D

Study of the austenite-martensite phase transition in steel using molecular dynamics — •Emilia Sak-Saracino and Herbert M. Urbassek — Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern

Using molecular-dynamics simulation, we study the austenite-martensite phase transition in various iron alloys. In these, we consider a dilute mixture of the alloying element (C, Ni or Cu) up to 1 at-%. The specimens are subjected to a heating/cooling cycle. The phase transition can be observed by monitoring the hysteresis of the system volume with temperature. For the alloying elements studied, we find that martensite and austenite temperatures decrease with increasing concentration, in agreement with experiment.