A New Approach to Solute Effect on Grain Boundary Migration

Huang Yan

doi:10.4028/www.scientific.net/MSF.753.131

Paper Titles

Formation of Annealing Twins during Recrystallization and Grain Growth in 304L Austenitic Stainless Steel
p.113

Kinetics of Thermal Grooving during Low Temperature Recrystallization of Pure Aluminum
p.117

Simulation of Grains Growing as Influenced by Triple Line Dragging
p.121

Disconnection Motion in Low- and High-Angle Symmetrical Tilt Grain Boundaries in HCP Metal
p.125

A New Approach to Solute Effect on Grain Boundary Migration
p.131

On the Generalisation of JMAK's Theory
p.137

Modelling the Evolution in Microchemistry and its Effects on the Softening Behavior of Cold Rolled AlFeMnSi-Alloys during Annealing
p.143

Modelling Time-Dependent Nucleation of Recrystallization in Aluminium Alloys
p.147

Modelling Dynamic Recrystallization in FCC Metals Employing Thermostatistics
p.153

HomeMaterials Science ForumMaterials Science Forum Vol. 753A New Approach to Solute Effect on Grain Boundary...

A New Approach to Solute Effect on Grain Boundary Migration

Abstract:

Solute drag theory is critically revisited and an alternative approach is presented to account for the effect of solute elements on grain boundary migration during annealing. A fundamental new concept is introduced in the model that, in the linear range of irreversible thermodynamics, solute atoms segregated in a grain boundary will not lag behind when the boundary migrates. While lagging behind is the very essential assumption for the solute drag theory. Instead of blaming the lagging behind, the mobility drop due to solute addition is attributed to the decrease in boundary energy as a result of boundary segregation. According to this model, grain boundary mobility is dependent on solute concentration rather than migration rate. The predictions of the model are compared with experimental results, with a good agreement.