Effect of Hybrid Nano Particle Reinforcements on Fractographic, Mechanical and Wear Behavior of Al6061 Alloy Composites Developed by Ultrasonic Assisted Stir Casting Technique
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https://orcid.org/0000-0003-2543-4801
Shobha Ramesh
Dept. of Industrial Eng. and Management, Ramaiah Institute of Technology, Bengaluru, Karnataka, India
https://orcid.org/0000-0003-0210-3540
Vedashantha Murthy Bharath
Dept. of Mechanical Eng., RNS Institute of Technology, Visvesvaraya Technological University, India,
https://orcid.org/0000-0001-6765-4728
Rajanna Siddagangappa
Dept. of Mechanical Eng., Government Engineering College, Mosale Hosahalli, Karnataka, India
https://orcid.org/0000-0001-9209-5104
Srimadhu Ashokkumar
Trelleborg Sealing Solutions, Bengaluru, Karnataka, India
https://orcid.org/0009-0002-7671-2381
Madeva Nagaral
Manager (Design), Aircraft Research and Design Centre, Hindustan Aeronautics Limited, Bangalore 560037, Karnataka, India
Virupaxi Auradi
Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru-572103, Karnataka, India
https://orcid.org/0000-0001-6549-6340
Abstract
The purpose of this study is to investigate the influence of hybrid nanoparticle reinforcement with Al2O3 and ZrO2 on the mechanical and wear parameters of Al6061 alloy-based Nano composites. MMC’s (Metal Matrix Composite) specimens were produced using an ultrasonic-assisted stir casting method. Al6061 with varying weight percentages of Al2O3 (0.5%, 0.75%, 1% and 1.25%) and ZrO2 (0.5%, 0.75%, 1% and 1.25%) were used as reinforcement. The fabricated samples were made to undergo various tests as per ASTM standards to evaluate tensile strength, hardness and wear properties. Scanning Electron Microscopy was used to analyze the microstructure of the produced nano composite to ascertain the distribution of Al2O3 and ZrO2 nano particles and to analyze the fractured and wear characteristics. The results indicate that there is increase in tensile behavior for the composition of Al6061matrix alloy reinforced with 1wt. % Al2O3 and 1wt. % ZrO2 hybrid reinforcement. The maximum hardness achieved was 90.9 Hv with 1% ZrO2 and 1.25% Al2O3, representing a significant improvement over pure aluminum. The prepared specimens were subjected to a wear test utilizing a pin-on-disc machine and results reveal that highest wear resistance was obtained for the hybrid reinforcement of 1wt.% Al2O3 and 1wt.% ZrO2 with Al6061 alloy matrix.
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