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G. Stechauner, E. Kozeschnik:
"Simulation of Cu precipitation in the Fe-Cu binary system";
in: "Advanced Materials Reasearch Vol. 922", Trans Tech Publications Ltd., 2014, 728 - 733.

Cu precipitation in steel has been investigated numerous times. Still, a consistent simulation of the nucleation, growth and coarsening kinetics of Cu precipitates is lacking. Major reason for this is the fact that Cu precipitation involves complex physical interactions and mechanisms, which go beyond the classical precipitation models based on evaporation and absorption of precipitate-forming monomers (atoms). In the present work, we attempt a comprehensive modeling approach, incorporating coalescence results from Monte Carlo simulation, prediction of the nucleus composition based on the minimum energy barrier concept, diffusion enhancement from quenched-in vacancies, dislocation pipe diffusion, as well as the transformation sequence of Cu-precipitates from bcc-9R-fcc. Our simulations of number density, radius and phase fraction coincide well with experimental values. The results are consistent over a large temperature range, which is demonstrated in a TTP-plot.

Fe-Cu precipitation, simulation, transformation, interface energy, coalescence

http://dx.doi.org/10.4028/www.scientific.net/AMR.922.728