| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Solid State Processing of Metals and Composites
|
| Presentation Title |
7075 Aluminum Graphene Composites Made by Shear Assisted Processing and Extrusion |
| Author(s) |
Xiao Li, Xiaolong Ma, Dalong Zhang, Timothy Roosendaal, Angel Ortiz |
| On-Site Speaker (Planned) |
Xiao Li |
| Abstract Scope |
Aluminum alloys are widely used in automobile and aerospace industrial thanks to its high strength-to-weight ratio. Aluminum Graphene composite is one of the promising composites material with improved strength, fracture toughness, and electrical conductivity. However, the current manufacturing processes have challenging to uniformly distribute graphene in the metal matrix. The high processing temperature also degrades graphene through oxidation or decomposition. In this study, Shear Assisted Processing and Extrusion (ShAPE), a solid state processing, is used to make 7075 graphene composite. The high shear deformation strongly stirred the aluminum alloy and dispersed the graphene homogenously in the matrix. The processing temperature is as low as 350oC which well-maintained the quality of the graphene by avoiding oxidation and carbide formation. Compared to 7075-T73 condition, the as-extruded sample has improved ductility 100% with the same ultimate strength. SEM and TEM show the graphene is distributed on the grain boundary and attached with precipitates. |