About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Engineering Gradient Microstructures in Fe-Mn Alloys via Laser-Directed Energy Deposition for Superior Dynamic Mechanical Properties |
| Author(s) |
Shanmukha Satya Srinivas Guraja, Ravi Sankar Haridas, Rajiv Mishra, Raj Banerjee |
| On-Site Speaker (Planned) |
Shanmukha Satya Srinivas Guraja |
| Abstract Scope |
Understanding the dynamic behavior of steels under extreme loading is key to advancing structural applications in crash, defense, and impact-critical environments. This study investigates the strain-rate-dependent deformation mechanisms of Fe-Mn steels fabricated via Directed Energy Deposition (DED), focusing on both uniform compositions (Fe-5 wt% Mn, Fe-10 wt% Mn, and Fe-15 wt% Mn) and a compositionally graded Fe→Fe-15wt%Mn structure. Quasi-static and high strain rate (Split Hopkinson Pressure Bar) compression tests are combined with EBSD, XRD, and post-deformation microanalysis to reveal how Mn content and spatial gradients affect phase stability, twinning-induced plasticity (TWIP), and transformation-induced plasticity (TRIP). The graded structure demonstrates improved strain accommodation and damage tolerance by leveraging local phase transformations. These results provide new insights into designing additively manufactured steels for high-performance applications under extreme mechanical and environmental conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Phase Transformations |