| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Influence of Chemical Composition on the Fracture Behavior of Advanced High Strength Steels |
| Author(s) |
Nhu N. Ngo, Bryan Webler, Petrus Chris Pistorius |
| On-Site Speaker (Planned) |
Nhu N. Ngo |
| Abstract Scope |
The third-generation advanced high strength steels (AHSSs) exhibit increased strength and formability due to their chemical composition and precisely controlled thermomechanical processing. Reliable production of these steels requires understanding of the chemical composition effects on microstructure development during all steps of processing. This study focuses on the as-cast fracture behavior by first characterizing the microstructures in the laboratory-cast ingots containing 0.2 wt.% C, with varying Mn, Si and Al concentrations. Gleeble tests were performed to measure tensile properties at 200-600°C. Main fracture mechanisms were identified and reduction in area was measured to investigate the ductility among the different compositions. To identify if the microstructure influences the fracture paths, ferrite along the crack path was quantified. Results show that ferrite in the microstructure does not influence the crack path and the fracture mechanisms identified are mixed (ductile and brittle), brittle, ductile (with bimodal voids), shear (with bimodal voids) and all. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, |