粒成長過程における低易動度粒界の挙動のモンテカルロシミュレーション

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タイトル別名
  • Monte Carlo Simulation for the Behavior of Low Mobility Grain Boundaries in Grain Growth
  • リュウ セイチョウ カテイ ニ オケル テイ イドウド リュウカイ ノ キョド

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The change in frequency of grain boundaries with low mobility were investigated during grain growth by using the Monte Carlo simulation. 4900 cells were generated and each grain consisted of several cells in an initial condition. Each grain was given a real number randomely. Two kinds of grain boundaries with different mobilities were characterized by the difference of each grain’s number. The mobility ratios were 1:1, 1:2, 1:10 or 1:100 and the fractions of grain boundary with low mobility in the initial state were 8, 32 and 73%.<BR>Grain boundaries with lower mobility tended to increase their existence ratio during grain growth, and this tendency increased with increasing mobility ratio. The frequency of grain boundary with lower mobility increased from 32% of the initial state to 55% as the grain size increased by four times. The drastic change of the fraction was observed when the grain size became large enough compared to the specimen area.<BR>From the initial state of 73%, the frequency of grain boundary with lower mobility increased up to 83%. However, little change of the frequency was observed from 8%. Meanwhile, there existed some areas of localized grain boundaries with lower mobility, and the change of microstructure in these areas were less than the other areas.<BR>Thus, the controlling factors for changing the fraction of the grain boundaries with lower mobility are; (1) the initial fraction of grain boundaries with lower mobility, (2) a ratio of the mobility and (3) a distribution of the boundaries with lower mobility.

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  • 日本金属学会誌

    日本金属学会誌 54 (6), 650-656, 1990

    公益社団法人 日本金属学会

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