中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 28 No. 10 October 2018 |
（1. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China;
3. Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, USA）
Abstract:Graphene/Inconel 718 composites were innovatively synthesized through selective laser melting, and the mechanical and tribological performances of the grapheme-reinforced Inconel 718 matrix composites were evaluated. The composite microstructures were characterized by XRD, SEM and Raman spectroscopy. The results show that selective laser melting is a viable method to fabricate Inconel 718 matrix composite and the addition of graphene nanoplatelets leads to a significant strengthening of Inconel 718 alloy, as well as the improvement of tribological performance. The yield strength and ultimate tensile strength of 1.0% graphene/Inconel 718 composites (mass fraction) are 42% and 53% higher than those of pure material, and the friction coefficient and wear rate are 22.4% and 66.8% lower than those of pure material. The decrease of fraction coefficient and wear rate is attributed to the improved hardness of composites and the formation of graphene nanoplatelet protective layer on the worn surfaces.
Key words: graphene; graphene/Inconel 718 composite; mechanical properties; friction and wear properties; microstructure; selective laser melting
