Abstract

Combining Gibbs adsorption equation and McLean's grain boundary segregation model derives an empirical relation for isothermal grain growth. This relation predicts that driving grain boundary energy to zero is possible in alloy with high segregation energy. Then the grain boundary is in a thermodynamic equilibrium in the presence of solute atoms and, therefore, grain growth is stopped. On this basis reducing grain boundary energy through solute segregation inhibits nano-scale grain growth, and then metastable equilibrium can be reached with saturated grain boundaries. Exact values for solute excess of grain boundary available for segregation at saturation, Γ b0, Gibbs free energy change of grain boundary segregation pre mole solute, Δ G seg, and/or equilibrium grain diameter, D *, can be achieved by fits of this model to the experimental results.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.