On the coarsening of precipitates located on grain boundaries and dislocations

The Lifschitz-Slyozov-Wagner theory of particle coarsening is applied to the case in which all the precipitates lie on grain boundaries. Earlier studies of the grain boundary precipitate coarsening problem have assumed that all mass transfer is limited to the grain boundary region and have shown that in the long time limit the average particle size increases with time as t14. The present investigation considers diffusion of solute to occur both …