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Mechanical and tribological analysis of functionally graded aluminium hybrid composite using RSM approach

Publication Type : Journal Article

Publisher : Materials Research Express, Institute of Physics Publishing,

Source : Materials Research Express, Institute of Physics Publishing, Volume 6, Number 9 (2019)

Url : https://www2.scopus.com/inward/record.uri?eid=2-s2.0-85070632044&doi=10.1088%2f2053-1591%2fab3168&partnerID=40&md5=97dfe5dbd13601af4a927826daca0264

Keywords : Adhesives, Centrifugal casting, Conventional materials, Functionally graded, Horizontal centrifugal castings, Hybrid composites, Mechanical analysis, Pin on disc tribometer, Response surface methodology, scanning electron microscopy, Silicon compounds, Surface properties, Tensile strength, Tribology, Vickers hardness, Wear characteristics, Wear of materials

Campus : Coimbatore

School : School of Engineering

Department : Mechanical Engineering

Year : 2019

Abstract : Functionally graded LM14 Al/12Si3N4/3Gr hybrid composite was developed through horizontal centrifugal casting with a wall thickness of 15 mm. Mechanical analysis like Vickers hardness (27%) and tensile strength (3%) were observed superior at Si3N4 rich outer zone than Gr rich inner zone. Rate of wear of Gr rich inner specimen (8-13 mm from outer) increases linearly with increase in applied load (10-50 N), non-linearly with slide distance (500-3000 m) and a slight decrease and a further increase in trend with slide velocity (1-4.5 m s-1) when studied based on Response Surface Methodology (RSM) five level run order, using pin on disc tribometer. Minimum rate of wear (0.0052 mm3 m-1) was observed at an optimum parametric influence of load, velocity and slide distance (10 N, 1 m s-1, 500 m). Worn composite surfaces were analyzed using Scanning Electron Microscope to understand the tribo-mechanisms, which led to deep groove formations and delamination at higher loads and shallow grooves at lower loads, along the sliding direction. Fabricated composite proves the ability to replace the conventional materials for automotive sliding applications like piston liners, which provides improved wear characteristics during dry sliding conditions. © 2019 IOP Publishing Ltd.

Cite this Research Publication : M. Sam and Dr. Radhika N, “Mechanical and tribological analysis of functionally graded aluminium hybrid composite using RSM approach”, Materials Research Express, vol. 6, 2019.

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