Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 10, Pages 14775-14789Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.10.236
Keywords
Aluminum alloy; Hot-rolling; Microstructure; Mechanical behavior
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Funding
- Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Government of India [SERB/F/2860/2016-17]
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In this study, the influence of titanium dioxide (TiO2) and graphite (Gr) hybrid reinforcement on the microstructure and mechanical behavior of Al7075 alloy was investigated. The hybrid composites showed improved microhardness and tensile strength after hot rolling, with good dispersion and alignment of reinforcement particles in the direction of rolling observed during microstructure examination.
In the present work, influence of titanium dioxide (TiO2) and graphite (Gr) hybrid reinforcement on microstructure and mechanical behavior of Al7075 alloy is studied. Al7075 and its hybrid composite samples were fabricated by using stir-casting and hot rolling technique. Hot rolling was carried out at a temperature of 450 ?C with a reduction-ratio of 90%. Microstructure examination showed a good dispersion of titanium dioxide and graphite reinforcement particles with excellent bond with Al7075 matrix alloy. In case of hot rolling, both the reinforcements were found to be aligned in the direction of rolling. The microhardness and tensile strength of hybrid composites were remarkably improved in case of hot rolling compared to that of cast composites.
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