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Investigation on Mechanical Properties and Analysis of Dry Sliding Wear Behavior of Al LM13/AlN Metal Matrix Composite based on Taguchi's Technique

[+] Author and Article Information
Radhika N

Department of Mechanical Engineering Amrita School of Engineering, Coimbatore Amrita Vishwa Vidyapeetham Amrita University India
n_radhika1@cb.amrita.edu

R. Raghu

Department of Metallurgical Engineering PSG college of Technology, Coimbatore India
messiraghu.777@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4035155 History: Received May 02, 2016; Revised October 20, 2016

Abstract

LM13/AlN (10 %) MMC and unreinforced aluminium alloy were produced under stir casting route. Microstructural characteristics were examined on the developed composite using optical microscope. The hardness and tensile test were carried out on both unreinforced aluminium alloy and the composite using Vicker's hardness tester and Universal Testing Machine respectively. Dry sliding wear behavior of the composite and unreinforced aluminium alloy was evaluated using pin-on-disc tribometer based on Design of Experiments approach. Experimental parameters such as applied load (10, 20 and 30 N), velocity (1, 2 and 3 m/s) and sliding distance (500, 1000 and 1500 m) were varied for three levels. Signal-to-Noise ratio analysis, Analysis of Variance and regression analysis were also performed. The characterization results showed that reinforcement particles were uniformly distributed in the composite. The hardness and tensile test revealed greater improvement of property in the composite compared to that of the unreinforced alloy. Wear plot showed that wear was increased with increase in load and decreased with increase in velocity and sliding distance. Signal-to-Noise ratio analysis and Analysis of Variance indicated that load has greater significance over the wear rate followed by velocity and sliding distance. Regression analysis revealed greater adequacy with the constructed model in predicting the wear behavior of the composite and unreinforced aluminium alloy. Scanning Electron Microscopy analysis evident that transition of wear from mild to severe occurred on increase of load in the composite.

Copyright (c) 2016 by ASME
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