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

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Published Mar 28, 2021
DOI https://doi.org/10.3221/IGF-ESIS.56.13

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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. (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), pp. 160–170. doi: 10.3221/IGF-ESIS.56.13.
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