About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Techniques for Multi-Scale Modeling in Advanced Manufacturing
|
Presentation Title |
Computational Modeling of Nanoparticles Dispersion in Hybrid Process of Ink Jetting and Laser Powder Bed Fusion |
Author(s) |
Milad Ghayoor, Bryce Cox, Joshua Gess, Somayeh Pasebani |
On-Site Speaker (Planned) |
Milad Ghayoor |
Abstract Scope |
Oxide dispersion strengthened alloys are metal-matrix composites in which nano-scale oxides inhibit grain growth at high temperatures providing improved mechanical properties and creep resistance. This study investigates the microstructure of 316L ODS alloy developed via hybrid of laser powder bed fusion and jetting approach. A laser powder bed fusion equipment was modified to enable ink jetting. The ink, containing nanoparticles of Al2O3, was selectively placed into the stainless steel powder bed. The laser consolidated the metal powder and nanoparticles into nanocomposite. A transient finite-difference heat transfer and fluid flow model was created to predict the motion of the nanoparticles throughout the hybrid process, with the goal of correlating nanoparticles placement to achieve a uniform dispersion and optimal thermal and mechanical properties. Model results are compared to experimental data and microstructural evolutions after laser powder bed fusion and post heat treatment. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Composites |