On the analytic calculation of critical size for alpha prime precipitation in FeCr

We present a calculation of the critical sizes and nucleation rates for the nucleation of α′ precipitates in an FeCr alloy. Our work combines the calculation of the FeCr free energy surface using molecular dynamics simulations with recently published data [1] for the interfacial free energies between the α and α′ phases in FeCr to obtain thermodynamic and kinetic data on the nucleation in this system. The results are made available as a set of fitting functions and their parameters.