|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications IV
||NOW ON-DEMAND ONLY – Identification of Nanoparticles Dispersion Mechanism in 316L Metal Matrix Composite Additively Manufactured by Hybrid Process of Jetting and Laser Powder Bed Fusion
||Milad Ghayoor, Omid Sadeghi, Bryce Cox, Ryan Doyle, Joshua Gess, Somayeh Pasebani
|On-Site Speaker (Planned)
Laser powder bed fusion (LPBF) is limited to producing monolithic alloy components. To produce metal matrix composites (MMC), the matrix is generally ball milled with second phase particles before the LPBF process; escalating the overall time, steps and cost of the manufacturing. In this work, an ethanol-based carrier containing Al13 nanoclusters, were deposited into the 316L powder bed via a Xerox print head mounted into a LPBF chamber. Then, the laser melts the MMC, dispersing nanoparticles into the matrix; eliminating the need of ball milling. Thermo-capillary Marangoni flow can disperse nanoparticles into the melt pool center. This approach enables us to selectively jet nanoparticles into the powder layers and change the composition of each layer; manufacturing the functionally graded alloys. Detailed characterization on 316L/Al2O3 nanocomposite using the proposed jetting approach revealed a similar microstructure and mechanical properties with nanocomposite produced with ball milling.
||Additive Manufacturing, Composites, Characterization