Characterization and Wear Properties of Al 7075/Sic/Gr Hybrid Composites
Atla Sridhar1, K.Prasanna Lakshmi2

1Atla Sridhar*, Research scholar, Mechanical Engineering Department, JNTU Hyderabad, India.
2K.Prasanna Lakshmi, Associate professor, Mechanical Engineering Department, JNTUH CE Manthani, India. 

Manuscript received on November 19, 2019. | Revised Manuscript received on 28 November, 2019. | Manuscript published on December 10, 2019. | PP: 2942-2947 | Volume-9 Issue-2, December 2019. | Retrieval Number: C7948019320/2019©BEIESP | DOI: 10.35940/ijitee.C7948.129219
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Abstract: In this work, dry sliding wear properties of Al 7075 Al 7075+ 5 wt.% SiC, Al7075 + 5 wt.% SiC + X wt.% graphite (X=5-10) hybrid nano-composites were developed by the principle of powdered metallurgy (P / M). Al 7075 hybrid nano-composites are highly promising materials that would be desirable for a wide range of applications. Under dry sliding conditions, the tests were carried out on a pin-on-disk machine was used to assess the loss of wear on base metal, composite and hybrid composites were calculated by different normal loads (5–20 N), and sliding speeds (0.5 – 2 m/s) and sliding distances (500–2000 m). Micro-structural examination of base metal and composites were investigated using an Optical Microscope (OM) and scanning electron microscope (SEM). The hybrid nano-composites revealed those greatest improvements in tribological results with 5 wt. % Silicon Carbide and 10 wt. % Graphite. Main wearing mechanism for hybrid composite materials has been established to form lubricating layer on both the surface and specimen. From experimental outcomes, it has been found that wear resistance tends to increase as weight percentage of the reinforcement increases.
Keywords: Aluminum 7075, Silicon Carbide, Graphite, Wear loss, Coefficient of friction and Dry Sliding Behavior
Scope of the Article: Composite Materials