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Abstract
The high-Mn twinning induced plasticity (TWIP) steels possess high strength combined with high formability due to the TWIP effects. To optimize the final mechanical properties of these steels, the characterization of static recrystallization behavior is highly needed. To address this demand a cold-rolled TWIP steel has been isothermally annealed at two different temperatures (600°C and 700°C). The microstructural characteristics such as the recrystallized fraction and interfacial area between the recrystallized and unrecrystallized grains have been determined. The distribution of nuclei and their impingement have been precisely examined through a proper observation. A continuous decrease of the velocity of recrystallization front is observed, which can be ascribed to the reduction of the driving force for migration as recrystallization advances. The results indicated that the stored energy gradients are responsible for nonhomogeneous distribution of nuclei and lower Avrami constant.
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