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Austenite formation and cementite dissolution during intercritical annealing of a medium-manganese steel from a martensitic condition
February 2021 • J. Mueller, Xiaohua Hu, Xin Sun, Yang Ren, Kyoo Sil Choi, Erin Barker, John G. Speer, David K. Matlock, Emmanuel De Moor
In the present study, in situ high-energy X-ray diffraction (HEXRD), dilatometry, and metallography were conducted for the purpose of understanding microstructure evolution during intercritical annealing of a Fe-0.19C-4.39Mn steel from a martensitic initial condition. Three different simulations for austenite growth and solute partitioning during isothermal holding were conducted using the DICTRA™ module of Thermo-Calc®. The microstructures after intercritical annealing exhibit film-like retained austenite; howeve…
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