Papers by Keyword: Grain Boundary Premelting

Abstract: The effect of heating rates on the premelting of grain boundary (GB) is investigated by the phase field crystal method. The microstructure evolution of premelting under different heating rates are discussed, and the film width of GB is quantitatively calculated in terms of the excess mass method. Results show that the liquid film appears as the melting point () is approached from below and that the film thickness is affected by heating rate. In heating process, at the same temperature (close to), the liquid film width is larger when the temperature increases with lower rate. In insulation process, the liquid film thickness increase until to its equilibrium value with holding time prolonging. For low-angle GBs, the higher heating rate the system has during heating stage, the lager equilibrium value of liquid film will be reached during insulation stage. For high-angle GBs, the liquid film thickness has the same equilibrium value during the insulation process although the heating rate is different during heating process.