| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
A Micropillar Compression Investigation into the Plastic Flow Properties of Additively Manufactured Alloys |
| Author(s) |
Ramamurty Upadrasta, Shi-hao Li |
| On-Site Speaker (Planned) |
Ramamurty Upadrasta |
| Abstract Scope |
The role of Solidification cells and high density of dislocations, common features in alloys processed using laser powder bed fusion (L-PBF) and directed energy deposition (DED), on the plastic properties was investigated via the micropillar compression on 316L stainless steel and the Inconel 718. The variations in the yield strength with the pillar size are similar to those reported on pillars fabricated from pre-strained Ni but are opposite to those reported on pillars of crystalline alloys. The mechanical responses of the pillars with and without cell boundaries (CBs) are similar, which suggests that the high density of dislocations—-and not the CBs—-determine the strength of the AM alloys. Further, results suggest that the dislocation networks significantly enhance dislocation storage, leading to bulk-like deformation behavior and superior work hardening capability in the L-PBF pillars with larger diameters. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Other |