Kinetics of Sub-Micron Grain Size Refinement in 9310 Steel

摘要: Recent efforts have focused on the development of novel manufacturing processes capable producing microstructures dominated by sub-micron grains. For structural applications, grain refinement has been shown to enhance mechanical properties such as strength, fatigue resistance, and fracture toughness. Through control thermo-mechanical processing parameters, dynamic recrystallization mechanisms were used produce consisting grains in 9310 steel. Starting with initial bainitic sizes 40 50 μm, various levels observed following hot deformation steel samples at temperatures strain rates ranging from 755 K 922 (482 °C 649 °C) 1 0.001/s, respectively. The resulting characterized using scanning electron microscopy backscatter diffraction techniques quantify extent carbide coarsening occurring during deformation. Microstructural models based Zener–Holloman parameter developed modified include effect ferrite/carbide interactions within system. These effectively correlate microstructural attributes thermal parameters.