Grain growth simulation of two phase structures under temperature gradient(Materials, Metallurgy & Weldability)
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The role of second phase and temperature gradient in the grain growth process has been investigated utilizing a Monte Carlo simulation method. A grain structure containing periodic arrays of second phase grains was constructed as the initial structure for the calculation. Two kinds of grain boundary migration rate were set depending on the character of grain boundaries, i.e, low angle boundaries and high angle boundaries. The migration rate was also set to be a function of temperature, and the temperature gradient field was applied to the calculation field. Grain growth was retarded around the second phase and also a lower growth rate was observed in the lower temperature region. Grain boundary character distribution was found to be affecting the growth process, and triple junctions containing many low mobility boundaries tended to act as passive junctions as if its vicinity region were lower temperature field.
- 大阪大学の論文
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