About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Multiscale Insights into B2 Precipitate Strengthening in Fe-Mn-Al-C High Performance Lightweight Steels with Variable Ni Content |
| Author(s) |
Muruganantham Rengasamy, Pradeep K. G. , Narasimhan Swaminathan |
| On-Site Speaker (Planned) |
Muruganantham Rengasamy |
| Abstract Scope |
The never-ending pursuit for lightweight, energy efficient materials has intensified interest in Fe-Mn-Al-Ni-C steels with high Aluminum content. These alloys exhibit high specific strength (up to ~220 MPa·g/cc) with excellent tensile ductility (~30%), making them ideal for next generation automotive applications aimed at reducing weight and greenhouse gases emission. Phase evolution through solute partitioning is a well-established strategy for tailoring the mechanical performance of structural materials. To this end, we have developed using combinatorial approach Fe(bal.)-16Mn-9Al-(x)Ni-0.9C (wt.%) steel with variable Ni content (5-15 wt.%) with the objective of enhancing the B2 phase volume fraction. A multiscale correlative microscopy approach integrating TEM, TKD and APT provided deeper insights into the phase formation, and localization of B2 nanoprecipitates. These nanostructural features appear to play a crucial role in reinforcing the grain boundaries of predominantly FCC matrix stabilized by Mn, thereby contributing significantly to the high-temperature stability and mechanical performance of the alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |