About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Improvement of Microstructure and Mechanical Performance of Wire-Arc Direct Energy Deposited Maraging 250 Steel by Friction Stir Processing |
| Author(s) |
Srinivasan Nagarajan, Todd Curtis, Grant Crawford |
| On-Site Speaker (Planned) |
Srinivasan Nagarajan |
| Abstract Scope |
The industrial application of maraging steels produced through wire-arc direct energy deposition (WDED) is limited by several factors, including elevated levels of defects (e.g., porosity, cracking, lack of fusion), non-uniform microstructure, and highly anisotropic properties. This study investigates the use of friction stir processing as a post-processing technique aimed at mitigating the defects from WDED of maraging 250 steel, while simultaneously enhancing its mechanical properties. The microstructural refinement, homogenization, and phase transformations induced by friction stir processing are characterized and compared to the as-fabricated WDED steel using EBSD, EDS, and X-ray diffraction. Moreover, microhardness and tensile properties of the friction stir-processed WDED steel are evaluated in correlation with the microstructural evolution from the as-fabricated WDED condition. The results indicate a notable improvement in the mechanical performance of friction stir processed WDED steel compared to its as-fabricated WDED counterpart, primarily due to reduction of defects and enhancement of microstructural uniformity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, Other |