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Friction and Wear Characteristics of Hot-Rolled Al7075-TiO2-Graphite Hybrid Composites

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Abstract

This paper investigates the effects of titanium dioxide and graphite hybrid reinforcement inclusion, as well as hot rolling, on the microhardness, microstructure, and friction–wear behaviour of a hybrid composite based on Al7075. Stir casting and hot rolling were utilised to develop hybrid composites composed of Al7075 dispersed with titanium dioxide and graphite. Microstructural examinations using a scanning electron microscope confirmed the existence of reinforcement particles and their orientations in the rolling direction. The wear test of hot-rolled and as-cast hybrid composites was conducted using an ASTM G99 pin-on-disc arrangement under dry sliding conditions. In terms of wear resistance and coefficient of friction, hot-rolled samples surpassed cast samples under all load and sliding conditions examined. Utilising SEM, the wear mechanisms of cast and rolled alloys, as well as hybrid composites, were analysed.

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Funding

This work was supported by the Science and Engineering Research Board (SERB), Government of India (Ref. No. SERB/F/2860/2016-17).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bengaluru, Karnataka, 560078, India

    Amithkumar Gajakosh (Assistant Professor, Research Scholar)

  2. Department of Mechanical Engineering, BTL Institute of Technology & Management, Bangalore, Karnataka, 560099, India

    Amithkumar Gajakosh (Assistant Professor, Research Scholar)

  3. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, 560078, India

    R. Keshavamurthy (Professor)

  4. Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore, 560078, India

    R. Vasanth Kumar (Assistant Professor)

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  1. Amithkumar Gajakosh
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Correspondence to R. Keshavamurthy.

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Gajakosh, A., Keshavamurthy, R. & Vasanth Kumar, R. Friction and Wear Characteristics of Hot-Rolled Al7075-TiO2-Graphite Hybrid Composites. J. Inst. Eng. India Ser. D 104, 623–642 (2023). https://doi.org/10.1007/s40033-022-00415-0

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