About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
An Investigation of Elastic Properties of Coal-derived Graphene-reinforced Aluminum Nanocomposites Using Friction Stir Welding and Molecular Dynamics Simulations |
Author(s) |
Saurav Kar, Roop Mahajan |
On-Site Speaker (Planned) |
Saurav Kar |
Abstract Scope |
In this paper, we report the findings of our experimental and numerical investigations of the elastic and shear properties of coal-derived graphene flakes-reinforced aluminum nanocomposites. Multilayer graphene flakes were exfoliated using our in-house developed single acid one-pot process. Number of stacking layers, shape and morphology were varied by changing acid concentration and temperature during synthesis of flakes from different ranks of coal. Graphene flakes-aluminum nanocomposites were then fabricated using friction stir welding—a solid-state additive manufacturing process—, which also selectively aligns flakes along the stirring plane. Elastic and shear moduli were then experimentally tested using an Instron universal testing machine. Numerical models were analyzed using molecular dynamics simulations. The experimental and simulation results illustrate that elastic properties of graphene flakes-reinforced aluminum nanocomposites are correlated to flake shape, size, and the number of stacking layers. Coal-derived graphene flakes are shown to be an effective reinforcement material with tunable material characteristics. |