| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XIII
|
| Presentation Title |
Improvement of Microstructure and Mechanical Performance of Wire Direct Energy Deposited Maraging 250 Steel by Friction Stir Processing |
| Author(s) |
Srinivasan Nagarajan, Roy Kesterson, Todd Curtis, Grant Crawford |
| On-Site Speaker (Planned) |
Srinivasan Nagarajan |
| Abstract Scope |
Deploying maraging steels fabricated by wire direct energy deposition (WDED) as industrial components is currently restricted by the high porosities, non-uniform microstructure, large residual stresses, and highly anisotropic properties encountered in this process. In this work, friction stir processing is employed as a post-processing tool to alleviate the defects inherent to WDED of maraging 250 steel and enhance the properties. Microstructural refinement, homogenization, and phase transformations introduced by friction stir processing are characterized and analyzed in comparison with the as-wire deposited steel using SEM, EBSD, and X-ray diffraction. Further, microhardness, tensile properties, and residual stress of friction stir processed steel are determined and correlated to the microstructural evolution from the as-wire deposited state. The results obtained demonstrate an improvement in the mechanical performance of friction stir processed-wire deposited maraging steel compared to the as-wire deposited steel and found to be strongly influenced by the elimination of pores and microstructural inhomogeneity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |