| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
A New Transient Surface Remelting Process for Smoothening AM Metals |
| Author(s) |
Kendall J. Yetter, Kyle Jung, Andrew Chuang, Michael Sangid, William LePage |
| On-Site Speaker (Planned) |
Kendall J. Yetter |
| Abstract Scope |
Surface roughness is a primary factor in the mechanical performance of AM parts, and thus, post processing methods are often employed for surface smoothing. However, current surface treatment methods require line-of-sight (unable to address internal features) and/or exhibit nonuniform surface removal (creating weak links in lattice structures). This presentation will discuss our new class of surface treatment that uniformly addresses beyond line-of-sight features through a transient liquid-phase surface remelting process. Thin films are first deposited onto as-built AM surfaces by either electroplating or atomic layer deposition (uniform and highly conformal). During heat treatment, the coating triggers local surface remelting by activating a eutectic reaction, resulting in a transient liquid phase that wets and solidifies isothermally into a smooth surface. Our results indicate ~25% increased fatigue strength in AM L-PBF Ti64. This talk will focus on connecting the detailed microstructures and mechanical properties associated with our new process for surface treatment. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Surface Modification and Coatings, Mechanical Properties |