About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Kappa-Carbide Precipitation and Hardening Response in Fe–Mn–Al–C-Based Multi-Principal Element Alloys |
| Author(s) |
Juhyeok Kwon, Alfredo Navarrete, Ritbik Kumar, Chandra Nath, Jianxun Hu, John Sutherland, Eric Lass, Peter Liaw |
| On-Site Speaker (Planned) |
Juhyeok Kwon |
| Abstract Scope |
Fe–Mn–Al–C-based multi-principal element alloys (MPEAs) are promising materials for improving energy efficiency in the automotive industry by offering significant weight reduction. Extensive research on austenitic Fe–Mn–Al–C-based MPEAs has followed their evolution from Hadfield steel. However, duplex lightweight steels remain underexplored owing to challenges in phase stability and processing. To overcome these challenges, this study examines the effect of carbon content on the duplex lightweight MPEAs containing medium-Mn and 6–7 wt % Al. Thermodynamic design and subsequent thermomechanical processing led to kappa-carbide precipitation. The aging process resulted in a modest increase in hardness due to precipitation hardening. In cold-worked samples, the hardening effect from precipitation was offset by recovery, suggesting a tradeoff between precipitation strengthening and prior work hardening during aging. This trend implies that controlling work hardening together with carbide precipitation is an effective strategy for designing lightweight MPEAs with tunable strength. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, High-Entropy Alloys |