About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
D-18: Mechanical Performance of a Si-Mo-V Alloyed UHSS Steel Under Isothermal Heat Treatment Conditions |
| Author(s) |
Jesús Campuzano-Chamonica, Jorge Tapia-Juárez, Octavio Vázquez-Gómez, Ricardo Guzman-Garfias, Héctor Javier Vergara-Hernández, José Jaime López-Soria |
| On-Site Speaker (Planned) |
Ricardo Guzman-Garfias |
| Abstract Scope |
Medium-carbon, low-alloy steels alloyed with Si, Mo, and V represent an alternative for structural applications that require high strength, ductility, and thermal stability. In this work, an experimental steel alloyed with Si, Mo, and V was subjected to thermal cycles of austempering and quenching-tempering. The microstructures were characterized by optical microscopy and X-ray diffraction, while mechanical performance was assessed through Vickers microhardness and uniaxial tensile tests. Austempering cycles resulted in bainitic and martensitic microstructures, accompanied by retained austenite, while the predominant microstructure in the tempering was tempered martensite, confirmed by XRD. Austempering treatments offer lower mechanical strengths with greater strain hardening capacity, but at the expense of reduced ductility. In contrast, tempered steels have higher strengths, accompanied by better elongation percentages. The results confirm that the microstructure influences the mechanical properties; the best mechanical performance is achieved through low-temperature tempering treatments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Iron and Steel, Mechanical Properties |