About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
2024 Technical Division Student Poster Contest
|
Presentation Title |
SPG-61: Characterization of Microstructure Periodicity in Additively Manufactured Components Fabricated through Laser Powder Bed Fusion: An Analysis Based on Orientation Segmentation Image Analysis |
Author(s) |
Sahar Beigzadeh, Jeffrey Shield |
On-Site Speaker (Planned) |
Sahar Beigzadeh |
Abstract Scope |
Additive manufacturing enables cost-effective and time-efficient production of complex components, utilizing a layer-by-layer approach. To fully benefit from additive manufacturing, an in-depth understanding of microstructural dynamics is required. This study investigated the periodic behavior of melt pool formation and dendritic structure in 718 Inconel coupons printed under varying laser power conditions. Noticeable periodic melt pool patterns along the build direction were observed, likely influenced by the laser scan path and cooling rate. We examined the relation between melt pool deviation at different build heights and dendritic microstructure by measuring the dendritic growth orientations along the build and recoater directions at multiple successive layers. Then, an orientation-filtering mask based on the SkeletonOrientation algorithm was developed to segment columnar/equiaxed zones along the build direction and recoater direction of the existing parts. Then, the results were evaluated by microhardness testing, showing a slightly periodic trend also along the build direction. |
Proceedings Inclusion? |
Undecided |
Keywords |
Additive Manufacturing, Characterization, Solidification |