About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Microstructural Optimization in High-Manganese Steels by Controlling Hot Rolling and Heat Treatment Conditions |
| Author(s) |
Victor Ronaldo Gaytan Calderón, Nancy Margarita Lopez Granados, Constantin Alberto Hernández Bocanegra, José Ángel Ramos Banderas, Nicolás David Herrera Sandoval |
| On-Site Speaker (Planned) |
Victor Ronaldo Gaytan Calderón |
| Abstract Scope |
This study investigates the influence of hot rolling with and without reheating, followed by annealing at different temperatures, on the microstructural evolution and stability of high-Mn steels. Two alloys with 0.14–0.40% C and 15–18% Mn were produced by induction melting from commercial AISI 1018 steel and subjected to hot rolling with final reductions above 80%. Post-deformation, annealing heat treatments were conducted at 700, 900, and 1000 °C, and the resulting microstructures were analyzed using conventional metallographic techniques. The results highlight the decisive role of chemical composition: the higher-C alloy promoted the coexistence of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms, while the low-C/high-Mn alloy exhibited enhanced austenitic stability with effective suppression of martensite formation. The hot rolling route also had a significant impact: samples processed with intermediate reheating developed finer and more homogeneous microstructures, in contrast to single-pass rolled samples, which retained deformation twins and showed microstructural heterogeneity. Annealing treatments further revealed that increasing temperature promoted recrystallization and grain growth, with 1000 °C leading to the most homogeneous austenitic microstructure. These findings demonstrate that both chemical composition and thermomechanical processing strongly influence the balance between TWIP and TRIP mechanisms, as well as the final grain structure. The combination of reheating during rolling and subsequent annealing at elevated temperature produced the most favorable microstructural condition, which is expected to optimize mechanical performance by enhancing the trade-off between strength and ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, Iron and Steel |