| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Effects of Inoculants on Melt Pool Geometry and Formation of Grain Structure in Inconel 718 Processed by Laser Powder Bed Fusion |
| Author(s) |
I-Ting Ho, Dhruv Tiparti, Kai-Chun Chang, An-Chou Yeh, Sammy Tin |
| On-Site Speaker (Planned) |
I-Ting Ho |
| Abstract Scope |
This investigation rationalizes the influence of TaCr2 and TiB2 inoculant particle additions to Inconel 718 processed by laser powder bed fusion(L-PBF), with primary focuses on the melt pool physics and resulting microstructural evolution. Overall, addition of these inoculants reshaped the melt pool by decreasing the melt pool width and surface instability in terms of the balling phenomenon. Interestingly, the degree of melt pool penetration was found to vary with the addition of different inoculant particles. This change strongly imapcted the formation of grain structures as the angle of the melt pool interface varies and affects both the heat transfer and solidification rate. The cumulated effects accounted for a comparatively more columnar-grained structure with <101> texture formed in samples containing TaCr2 particles while a relatively equiaxed-grained structure with <001> texture formed in samples containing TiB2. The effectiveness of inoculants in L-PBF processed Alloy 718 will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Other |