The micro-mechanisms operating during dynamic continuous recrystallization of an Al–4Mg–0.3Sc alloy were studied in real time by reloading pre-deformed samples at temperature in situ in the transmission electron microscope. The processes responsible for the evolution of the microstructure include the migration and breakup of sub-grain boundaries, the destruction of triple junctions, and large-scale volume rotations. These observations were considered in terms of the micro-mechanisms proposed previously to account for dynamic continuous recrystallization.

Direct Observation of the Behavior of Grain Boundaries during Continuous Dynamic Recrystallization in an Al–4Mg–0.3Sc Alloy. L.M.Dougherty, I.M.Robertson, J.S.Vetrano: Acta Materialia, 2003, 51[15], 4367-78