Abstract
A transformation-induced plasticity steel was thermomechanically processed and then transformed to bainite at an isothermal transformation temperature of 723 K for 1800 seconds, which exceeds the time required for completion of the bainite transformation. The formation of lenticular-shaped carbides with a triclinic lattice and internal substructure was found after thermomechanical processing. After 16 years of storage at room temperature, the decomposition of retained austenite into pearlite was observed for the first time at this temperature.
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Acknowledgments
The authors would like to acknowledge the financial support of Deakin University and the University of Wollongong, Australia. Deakin University’s Advanced Characterisation Facility is acknowledged for use of the FIB-SEM, TEM, and APT. The JEOL JSM-7001F at the UOW-EMC was funded by the Australian Research Council—Linkage, Infrastructure, Equipment and Facilities Grant LE0882613. The Oxford Instruments 80 mm2 X-Max EDS detector was funded via the 2012 UOW Major Equipment Grant scheme. A. Gazder acknowledges the 2019 AIIM for Gold - Investigator Grant.
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Timokhina, I.B., Gazder, A.A., Wang, J. et al. On the Degradation of Retained Austenite in Transformation Induced Plasticity Steel. Metall Mater Trans A 51, 3802–3810 (2020). https://doi.org/10.1007/s11661-020-05823-z
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DOI: https://doi.org/10.1007/s11661-020-05823-z