COMPUTER-SIMULATION OF GRAIN-GROWTH WITH CONSCIOUS OF MICROSTRUCTURALIMAGE DATA-BASE

Simulation of grain growth towards the microstructural image data base has been performed by the Monte Carlo technique proposed by Exxoton's group. In the present simulation, dependence of grain boundary energy on crystallographic misorientation, which is expressed in the same wa y as the vector method (one of the ODF analysis methods) is taken into consideration in order to describe actual microstructures. For the ev olution of the simulated microstructure, more realistic feature and mi gration of grain boundary are observed with an increase in the number of neighboring shell k(s) for calculating the interactive energy. Grai n growth exponents n in the microstructures with k(s)greater than or e qual to 3 are about 0.4 similar to 0.5. Grains surrounded with low ene rgy boundaries grow preferentially. Further, it is found that the low energy grain boundaries do not always decrease in length during gain g rowth, while the high energy grain boundaries decrease gradually.