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A new approach to predict the propagation of abnormal grain growth is presented. The growth rate of an existing large (abnormal) grain is compared to the growth rate of the surrounding (normal) grains. A very simple argument based on the reduction of grain boundary surface serves as driving force, whereas the pinning force is due to second phase precipitates. The model is successfully tested and validated on a low alloy steel presenting various state of precipitation depending on thermal history.
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Razzak et al. (2012) studied this question.
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