About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Microstructural Evolutions in Jetting Reinforcement Nanoparticles to Metal Matrix in Laser Powder Bed Fusion |
Author(s) |
Milad Ghayoor, Omid Sadeghi, Ryan Doyle, Bryce Cox, Joshua Gess, Somayeh Pasebani |
On-Site Speaker (Planned) |
Milad Ghayoor |
Abstract Scope |
Oxide dispersion strengthened (ODS) alloys are metal-matrix composites in which nano-oxides suppress grain boundary mobility at elevated temperature and enhance creep resistance. Conventional manufacturing of ODS alloy includes numerous steps such as mechanical alloying and hot consolidation, making it costly and time-consuming. The laser powder bed fusion (LPBF) process was utilized to produce 316L ODS alloy. This study investigates the microstructure of 316L ODS alloy developed via two different additive approaches. First, 316L powder and alumina particles were mixed and used as feedstock for producing 316L ODS. Second, ink-jetting in LPBF process was utilized to manufacture 316L ODS. The ink, containing nanoparticles of alumina, was selectively deposited into powder bed, and then laser consolidated powder and nanoparticles into nanocomposite. Detailed microstructure characterization revealed that the alumina was melted, precipitated, and homogenously dispersed in the matrix during solidification; thus, eliminating ball-milling and further machining to make a component from ODS alloys. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |