Analysing mobility from austenite grain growth data

Abstract

Abstract To obtain information on mobility of grain boundaries in austenite grain growth data has been collected from the open literature, to fit a physics-based grain growth model, which relates the mean grain size to the annealing time. The suitability of this model for predicting the grain size as a function of time is discussed and some preliminary results on the reduced mobility are presented. For the compositions in the database it has been found that the activation energy ranges from 100 to 600 kJ/mol. Such high activation energies cannot be explained well with many solute drag models.