| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
A-9: Inclusion Modification in AISI 316L by Addition of AlN via Laser Powder Bed Fusion |
| Author(s) |
Seung-Hoon Lee, Jung-Wook Cho |
| On-Site Speaker (Planned) |
Seung-Hoon Lee |
| Abstract Scope |
In Laser Powder Bed Fusion(L-PBF) process, oxide inclusion dispersed in the matrix has been studied to achieve comparative mechanical properties. However, there are few trials that have been explored; the oxide inclusion modification and utilization of nitride particles. In this work, the 316L specimen was manufactured with the addition of alloying element; 1wt. % of Aluminum nitride (AlN) powder with 316L powder. Powder mixing led to a diminishment of the oxygen content from 489ppm (powder) to 244ppm (as-built). The melt pool’s reduction behavior was accelerated due to aluminum. The inclusions were observed to be alumina. The larger epitaxial grains were observed within the change in texture orientation, which correlated to the melt pool stability and temperature distribution. Improvement in strength was measured considering Orowan strengthening, Hall-Patch equation, and the dislocation density. The results show that variation of the oxygen content in the melt pool results in mechanical properties change. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Characterization |