Abstract
In order to develop a comprehensive understanding about the effect of different holding time under rapid heating on the microstructural evolution and mechanical properties of transformation-induced plasticity (TRIP) steel, continuous annealing process simulations were performed using a thermal system with resistance heating method. The morphology and distribution of all phases present in the microstructure and the mechanical properties of TRIP steel were revealed. It appeared that the final tensile strength of the TRIP steel increased and retained austenite carbon content decreased with increasing holding time. An overlap between ferrite recrystallization and austenitization was observed during intercritical holding. In addition, the work hardening of the samples was evaluated by calculating the instantaneous n value as a function of the true strain. The difference in work hardening behavior corresponds to the rate of the retained austenite transformation during straining, which can be attributed to the carbon content and the morphology of the retained austenite.
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Foundation Item: Item Sponsored by National Twelfth Five-year Science and Technology Support Program of China (2011BAE13B01, 2011BAE13B03)
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Xu, Dc., Liu, Yd., Li, J. et al. Microstructure Characterization and Mechanical Properties of TRIP-aided Steel under Rapid Heating for Different Holding Time. J. Iron Steel Res. Int. 23, 138–144 (2016). https://doi.org/10.1016/S1006-706X(16)30025-5
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DOI: https://doi.org/10.1016/S1006-706X(16)30025-5