| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-112: Investigating the Microstructures of As-Cast Advanced High Strength Steels |
| Author(s) |
Nhu N. Ngo, Bryan Webler, Petrus Chris Pistorius |
| On-Site Speaker (Planned) |
Nhu N. Ngo |
| Abstract Scope |
Third-generation advanced high strength steels (AHSSs) have improved strength and ductility given their compositions and thermomechanical processing. Chemical compositions affect the properties of the semi-finished steel and reliable production requires understanding of the microstructure development across all processing steps. This research focuses on the as-cast microstructure by characterizing laboratory-cast ingots containing 0.2 wt.% C, with varying Mn, Si and Al concentrations. A limited number of heat treatments were also conducted to verify Thermo-Calc predictions of austenitization behavior. The microstructure constituents were compared against Thermo-Calc diffusion simulation results. Results show that increasing the Al and Si concentrations increases the A3 transformation temperature and the amount of ferrite. Microstructures at room temperature are mainly bainite and ferrite. Specifically, individual Si-containing steels have proeutectoid ferrite and those with combined Si and Al alloy have primary ferrite. A steel alloyed with only Al has a mixture of primary and proeutectoid ferrite. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, Solidification, Phase Transformations |