Stochastic Statistical Theory of Precipitation in Metastable Alloys with Application to Fe-Cu and Fe-Cu-Mn Alloy Systems

Konstantin Khromov; Frederic Soisson; Andrey Stroev; Valentin Vaks

doi:10.4028/www.scientific.net/SSP.172-174.1146

Paper Titles

Theoretical Investigation of Alloy Phase Equilibria by Continuous Displacement Cluster Variation Method
p.1119

Simulation of the Kinetics of Grain-Boundary Nucleated Phase Transformations
p.1128

Lengthening Kinetics of Pro-Eutectoid Ferrite Ledge in Fe-C Alloy under Interface-Diffusion Mixed Control Mode
p.1134

3D Cellular Automata Modelling of Solid–state Transformations Relevant in Low–alloy Steel Production
p.1140

Stochastic Statistical Theory of Precipitation in Metastable Alloys with Application to Fe-Cu and Fe-Cu-Mn Alloy Systems
p.1146

Diffusion under a Stress in Metals and Interstitial Alloys
p.1156

Thermodynamic Aspects of Liquid Phase Sintering B-Containing P/M Stainless Steels
p.1164

Thermodynamic Modelling of Carbide Precipitation in Hot Work Tool Steels with Different Silicon Contents
p.1171

Modeling of Growth and Dissolution of Grain Boundary Cementite in Vacuum Carburizing Process
p.1177

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Stochastic Statistical Theory of Precipitation in Metastable Alloys with Application to Fe-Cu and Fe-Cu-Mn Alloy Systems

Abstract:

The consistent and computationally efficient stochastic statistical approach is suggestedto study kinetics of decomposition of metastable alloys. An important parameter of the theory is thesize of locally equilibrated regions at the nucleation stage which is estimated using the ``maximumthermodynamic gain'' principle suggested. For several realistic models of Fe-Cu alloys studied, the re-sults obtained agree well with kinetic Monte Carlo simulations. Application of methods developed tostudies of decomposition of Fe-Cu-Mn alloys revealed a great sensitivity of evolution to both the con-figurational and kinetic interatomic interactions in an alloy. Using for these interactions the availablefirst-principle and CALPHAD estimates, we can well reproduce the peculiar features of decomposi-tion of Fe-Cu-Mn alloys observed in experiments.