MICROSCOPIC COMPUTER SIMULATIONS OF DIRECTIONAL COARSENING IN FACE-CENTERED CUBIC ALLOYS

摘要

We carried out Monte Carlo simulations of phase separation in a three-dimensional binary alloy with misfitting phases subjected to uniaxial external stress. A lattice of cylindrical or plate-like precipitates is formed at the mesoscale, as observed in real alloys. The rate of precipitate growth is much slower than the conventional R(t)~t1/3 behavior in systems with no elastic misfit. Once a well-defined precipitate micro- structure is formed, the reversal of external applied load has only a small effect.