Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques

M. Ravikumar; R. Suresh; H. N.  Reddappa; Y. S.  Ram Mohan; C. R.  Nagaraja; E. R. Babu

doi:10.3221/IGF-ESIS.56.13

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Published Mar 28, 2021

DOI https://doi.org/10.3221/IGF-ESIS.56.13

M. Ravikumar

Department of Mechanical Engineering, R L Jalappa Institute of Technology, Bangalore (R), Karnataka, India

R. Suresh

Department of Mechanical and Manufacturing Engineering, MSRUAS, Bangalore, Karnataka, India

H. N. Reddappa

Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, Karnataka, India

Y. S. Ram Mohan

Department of Aerospace Engineering, B M S College of Engineering, 560019, Bangalore, India

C. R. Nagaraja

Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, Karnataka, India

E. R. Babu

Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, Karnataka, India

Abstract

The Al₂O₃-SiC reinforced Al7075 Metal Matrix Composite (MMCs) is fabricated through liquid metallurgical technique. Ceramic particulates were amalgamated into aluminium alloy to achieve improved mechanical properties and wear resistance. Al-7075/Al₂O₃/SiC hybrid MMCs were produced by reinforcing 2%, 3%, 4% and 5% of Al₂O₃ and 3%, 5% and 7% of SiC particles. Microstructural analysis was carried out to evaluate the uniform dispersal of reinforcing particulates within the base matrix. The output results indicate that the mechanical properties of the hybrid MMCs enhanced by increase the wt. % of ceramic particulates. Tensile fractography results show the internal fracture structure of the tensile test specimens in which the particulates fracture and pullouts were observed. The wear characteristics of developed composites are studied using pin on disc apparatus. The high wear resistance is observed at 5% Al₂O₃ + 7% SiC reinforced MMCs.

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Issue

Vol. 15 No. 56 (2021): April 2021

Section

Advanced Manufacturing and Processing

How to Cite

Ravikumar, M., Suresh, R., Reddappa, H. N., Ram Mohan, Y. S., Nagaraja, C. R., & Babu, E. R. (2021). Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques. Frattura Ed Integrità Strutturale, 15(56), 160–170. https://doi.org/10.3221/IGF-ESIS.56.13

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