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IJSTR >> Volume 9 - Issue 6, June 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Investigation of wear resistance and mechanical properties of CNT reinforced aluminium 7075 alloy for gear applications

[Full Text]



Manikandan.K*, Jeeva.S, Gokul Santhosh.V, Gokul.K



Aluminium 7075 alloy, carbon nanotube particles, stir casting process, pin-on-disc tribometer, strength, composite material.



This project is based on the investigation of aluminium matrix reinforced with carbon nanotube particles. The investigation involves the analysis of wear resistance and the mechanical properties of the composite. The composite can be either ceramic matrix composite or metal matrix composite. This project is based on the metal matrix composite as we have decided to analyse the carbon nanotube reinforced aluminium. The aluminium 7075 alloy is selected because of its excellent resistance to fatigue, high strength and toughness. On the other hand, carbon nanotube particles offer excellent tensile strength and hardness to materials due to their nano structure and strength of the bonds between carbon atoms. The carbon nanotube particles are reinforced with aluminium 7075 by the stir casting process. The stir casting process is the most suitable way to reinforce because only then the carbon nanotube particles mix in correct proportions. Then the casted product is tested for wear resistance and the mechanical properties. The casting is done by adding appropriate proportion of carbon nanotube particles. Here, the 2wt% of carbon nanotube is used. For doing the wear test, a pin of 8mm diameter and 23 mm length of the casted portion is taken. The pin is then analysed for wear characteristics using pin-on-disc tribometer. The mechanical tests such as hardness tests, tensile tests and impact tests are performed on the casted product and the results are recorded. The traditionally used metals may not satisfy the vast engineering application. The metals cannot be used in all the applications considering the weight, strength and durability. In this regard, the composite materials can be replaced for the traditionally used metals. The composite material has good versatility properties which can be used in various applications. For each application, we can select the appropriate composite. Some of the properties of the composite materials include light weight, high strength etc. The results recorded in pin-on-disc tribometer test is used to draw graphs explaining the wear characteristics and the wear rate value for the composite is determined. The readings taken from material testing are used to find the strength of the material.



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