| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
2021 Technical Division Student Poster Contest
|
| Presentation Title |
Micro-structure Dependent Nano-scratch Behavior in Additively Manufactured Inconel 718 |
| Author(s) |
Mustafa Rifat, Saurabh Basu |
| On-Site Speaker (Planned) |
Mustafa Rifat |
| Abstract Scope |
Surface finishing of Additively Manufactured (AM) parts is necessary for smoothing as-built roughness textures. Finishing processes often rely on the localized deformation of surface. Herein, a better understanding of the deformation behavior of surficial grains is required to optimize these finishing processes. In this study, nano-scratch tests are performed in Direct Metal Laser Sintered (DMLS) Inconel 718 components. It is shown that pile-up behavior of the scratches is correlated with the distance of grains from the surface (d) and Taylor Factor (M) of the grains. Mechanistic origins of this behavior are pursued in the as-built microstructure characteristics, viz. grain boundaries and the preexisting dislocation density in the scratch zones. Microstructure and nanoscratch profiles were characterized using Orientation Imaging Microscopy (OIM) and Atomic Force Microscopy (AFM), respectively. The experiments were supplemented by a preliminary Finite Element Analysis based nanoscratch model in ABAQUS. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, |