Simulation of Heat Affected Zone Martensite Tempering using Molecular Dynamics in LAMMPS
Hassan Rezayat
Department of Mechanical, Aerospace & Biomedical Engineering, University of Tennessee
This page shows the result from Molacular Dynamics simulation of a Fe-C system using LAMMPS.
In martensitic steels, the root cause for heat affected zone softening and
resultant degradation in local mechanical properties is attributed to
martensite decomposition into softer structure with ferrite and cementite,
due to thermal cycles. In this work, we studied the effect of heating cycle
on martensite tempering using a three-dimensional MD simulation for an
Iron-Carbon system with 1.48wt.%C. Modified embedded-atom method
(MEAM) for Fe-C was used. Results showed that carbon atoms get
activate by increasing temperature. A migration of carbon atoms was not
observed for this system.
Color Legend:Interactive Structure
posted: April 2016.