Grain growth and disperse particles: Impact of triple junctions

Grain growth under the influence of randomly distributed particles is simulated. After some time of the process evolution at a constant particle volume fraction, suppressed grain growth, abnormal growth and normal growth were observed when moving along the particle size axis. If triple junctions formed by grain boundary and particle surface are taken into account, this affects the above order: at relatively large particle volume fraction, an additional range of normal grain growth occurs in the immediate neighborhood to the range of suppressed growth. Similar behavior in a zone-annealed ODS alloy is described in literature. (C) 2012 Elsevier B.V. All rights reserved.