Title: Frictional behaviour of AA7050/B₄C_p hybrid composites

Authors: R. Ranjith; P.K. Giridharan; M. Subramanian

Addresses: Department of Mechanical Engineering, SNS College of Technology, Coimbatore, 641-035, Tamil Nadu, India ' Department of Mechanical Engineering, Kumaraguru College of Technology, Coimbatore, 641-035, Tamil Nadu, India ' Department of Mechanical Engineering, SNS College of Technology, Coimbatore, 641-035, Tamil Nadu, India

Abstract: In this work, AA7050 aluminium alloy reinforced with SiC_p was fabricated through the liquid stir casting technique. The influence of % reinforcement, sliding speed, applied load and sliding distance on friction coefficient was investigated using a pin on disc equipment with tests based on the design of experiments. The results revealed that the friction coefficient increases with an increase in % reinforcement. Sliding speed, load and distance follow the similar trend that is at saddle point it registers maximum and after that COF decreases with an increase in any of the above-said parameters. The result showed that the presence of a mechanical mixed layer reduces the coefficient of friction and it's broke down leads to an increase in friction factor. The presence of mechanical mixed layer was confirmed through EDAX analysis. A mathematical model for friction coefficient was developed using response surface methodology and the combined effect of process parameters was thoroughly analysed.

Keywords: coefficient of friction; COF; ANOVA; mathematical modelling; stir casting; K2TiF6.

DOI: 10.1504/IJCMSSE.2019.102285

International Journal of Computational Materials Science and Surface Engineering, 2019 Vol.8 No.2, pp.89 - 99

Received: 20 Feb 2018
Accepted: 03 Sep 2018
Published online: 16 Sep 2019 *

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