Deformation stimulated transformation plays an important role in structural refinement of controlled rolled steels and also during intercritical rolling. Theory indicates that deformation prior to transformation should increase the tranformation rate, due to enhanced nucleation and more rapid growth. The aims of thiswork are to more clearly separate the roles of nucleation and growth kinetics to better understand the mechanisms inoperation and to extend a mixed mode, mean field transformation model to describe the transformation kinetics from deformed austentie. A systematic experimental study of transformation subsequent to plastic deformation in the austenite phase field is described. Experimentally determined continuous coolig transfomation curves are presented which reveal a systematic variation in the transformation curves are presented which reveal a systematic varation in the transformation kinetics with increasing deformation. The results of characteristiation of the prior transformation and post transformation microstructures are also described. Steps taken to modify the transformtion model to account for deformation induced changes in grain morphology and the additional driving force arising from the stored energy of deformation are described.
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