Berlin 2015 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 3: Microstructure and Phase Transformations

MM 3.4: Vortrag

Montag, 16. März 2015, 11:00–11:15, H 0106

Atomistic simulation of the martensitic phase transition in the iron-nickel system — •Emilia Sak-Saracino and Herbert M. Urbassek — Physics Department and Research Center OPTIMAS,Erwin-Schrödinger-Straße, 67663 Kaiserslautern, Germany

Nickel is one of the most important alloying elements in steel manufacture because of its slow rate of oxidation at room temperature and also as a material for ultra-high-strength steels where the strength does not originate from carbon interstitials, but from inter-metallic compounds. By using molecular dynamics simulation, we investigate the behavior of the martensitic phase transition in the iron-nickel system. We observe this transition by imposing a heating/cooling cycle on the system and monitoring the hysteresis of the system volume with temperature. In addition we report the change of the lattice constant and of the average cohesive energy as a function of nickel content.