| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Oxide Dispersion Strengthened (ODS) SS316L Prepared by Laser Powder Bed Fusion: Analysis of Microstructure and Hardness Properties |
| Author(s) |
Changyu Ma, Yu-Keng Lin, Tianqi Zheng, Philip Mallory, Y. Morris Wang, Xiaochun Li, Bruce Kang, Bingbing Li |
| On-Site Speaker (Planned) |
Changyu Ma |
| Abstract Scope |
Dense oxide dispersion strengthened (ODS) SS316L with 0.5wt.% Y2O3 fabricated by laser powder bed fusion (L-PBF) additive manufacturing using spherical SS316L powder embedded with nano-Y2O3 and different building patterns. The density, grain growth, phase formation, and microhardness of the as-printed ODS SS316L were investigated through optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-Ray Spectroscopy (EDX), and Vickers hardness testing, respectively. The results showed that there was uniform dispersion of Y-rich nanoparticles in dense ODS SS316L printed with meander and chessboard patterns owing to the ultrafine Y2O3 in powder feedstock, contributing to a fine-grain structure in the as-printed ODS SS316L. A smaller molten pool was observed in ODS SS316L printed with a chessboard pattern compared to meander strategy, and enhanced microhardness was observed in ODS SS316L compared to pristine SS316L. Based on the above findings, the Y2O3 effects on microstructure evolution and reinforcing mechanisms of microhardness were discussed. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |