Production and Characterization of AA7075-Graphite Composite Using Friction Stir Processing | ||||
| Journal of Petroleum and Mining Engineering | ||||
| Article 11, Volume 20, Issue 1 - Serial Number 130, 2018, Page 101-110 PDF (942.68 K) | ||||
| Document Type: Full-length article | ||||
| DOI: 10.21608/jpme.2018.40652 | ||||
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| Authors | ||||
| Osama M. Awad* 1; Mohamed M. El-Sayed Seleman2; M. M. Z. Ahmed3; H. R. Ammar4 | ||||
| 1Nasr Petroleum Company, Suez, Egypt | ||||
| 2Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, 43511, Suez, Egypt Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE), 43511 Suez, Egypt | ||||
| 3-Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, 43511, Suez, Egypt -Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE), 43511 Suez, Egypt -The British University in Egypt, Mechanical Engineering Department, El-Sherouk City 11837, Cairo, Egypt | ||||
| 4-Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, 43511, Suez, Egypt -Suez and Sinai Metallurgical and Materials Research Center of Scientific Excellence (SSMMR-CSE), 43511 Suez, Egypt | ||||
| Abstract | ||||
| AA 7075 Aluminum alloy has been received a special attention in aerospace and transportation industries because it provides a good combination of strength, ductility, and toughness. In this study, friction stir processing (FSP) technique is used to produce a self-lubricating AA7075/graphite composite. The composite was produced at different rotating speeds of 400, 800, and 1200 rpm with a constant traveling speed of 50 mm/min and 3⁰ tilt angle applied for one and two passes for each condition. Optical microscopy (OM), and scanning electron microscopy (SEM) were used to investigate microstructure. Vickers hardness and wear testing were conducted to the composite specimens. It was obtained that the dispersion of graphite particles in the AA7075 Al alloy enhanced by increasing both rotating speed and number of passes. The produced AA7075/graphite composite showed higher hardness and wear resistance than the AA7075 base alloy. The highest hardness value (156.2 Hv) was gained for the produced AA7075/graphite composite at 800 rpm rotating speed after FSP second pass comparing to base metal (79 Hv). Whereas, the higher wear resistance value was obtained for the processed composite at 800 rpm after the FSP first pass. | ||||
| Keywords | ||||
| AA7075 Al alloy/graphite composite; Friction stir processing; Microstructure; Mechanical Properties | ||||
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