Abstract
Aluminium is the third most abundant material in the Earth’s crust and, along with its alloys, is essential in many engineering sectors, including aerospace, automotive, defence, marine, construction, and medicine, owing to its high damage tolerance, fatigue resistance, conductivity, corrosion resistance, and low density. Despite this, some mechanical properties of Aluminium do not yet satisfy increasing industrial demands. Reinforcing aluminium alloys with other elements is considered as a means of providing additional strength. This study aims to investigate the effect of milling speed and time on graphene-reinforced aluminium alloy powder, intended for use in selective laser melting (SLM), prepared using high-energy ball milling (HEBM). The experimental study indicates that using a slow milling speed (100 rpm) for up to 2 h does not affect the shape of the powder substantially, and the graphene nanoparticles (GNPs) do not adhere to the powder surface in a metal matrix composite (MMC). However, a faster milling speed (250 rpm) flattens and crumbles the powder, and adheres the graphene sheets to the alloying powder, due to the higher impact energy produced by centrifugal and Coriolis forces.
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Acknowledgements
The authors wish to thank ASTUTE 2020 (Advanced Sustainable Manufacturing Technologies). This operation, supporting manufacturing companies across Wales, has been part-funded by the European Regional Development Fund through the Welsh Government and the participating Higher Education Institutions. This study is also supported by the ministry of national education of Turkey.
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Pekok, M., Setchi, R., Ryan, M., Han, Q. (2021). Effect of Milling Speed and Time on Graphene-Reinforced AA2024 Powder. In: Scholz, S.G., Howlett, R.J., Setchi, R. (eds) Sustainable Design and Manufacturing 2020. Smart Innovation, Systems and Technologies, vol 200. Springer, Singapore. https://doi.org/10.1007/978-981-15-8131-1_20
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DOI: https://doi.org/10.1007/978-981-15-8131-1_20
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