About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-78: Discerning the NiAl-Type B2 Nanoprecipitates by 3D-APT in High-Ni Alloyed Fe–Mn–Al–C Structural Steel |
| Author(s) |
Muruganantham Rengasamy, K. G. Pradeep , Narasimhan Swaminathan |
| On-Site Speaker (Planned) |
Muruganantham Rengasamy |
| Abstract Scope |
Fe–Mn–Ni–Al–C lightweight, structural steels exhibit exceptional yield strengths (0.5–1.6 GPa), owing to the formation of NiAl-type B2 (ordered BCC) nanoprecipitates. With their unique combination of low density (ρ ≤ 7.00 g·cm⁻³) and high specific-energy absorption (0.4–0.6 J·mm⁻³) capability, these alloys are regarded as promising candidates for next-generation automotive structural components. In the case of Fe–16Mn–9Al–0.9C steels with 5 wt.% Ni, off-stoichiometric B2 precipitates were reported to be preferentially nucleating along austenite grain boundaries. The present study explores the role of higher Ni contents (x = 10-15 wt.%) on the formation, local chemistry and volume fraction of B2 nanoprecipitates using three-dimensional atom probe tomography (3D-APT) at near-atomic resolution. This presentation highlights the role of higher Ni contents on the characteristics of B2 nanoprecipitates and discuss the corresponding implications for mechanical properties. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, Mechanical Properties, Sustainability |