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    Volume 5, Issue 1 (December 2016)

    The Effect of Production Process Parameters on the Tensile Strength of Squeeze Cast Al2O3+SiC/Al6061 Hybrid Composites

    (Received 19 April 2016; accepted 14 October 2016)

    Published Online: 29 December 2016

    CODEN: MPCACD

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    Abstract

    This study investigated the conditions for the optimal performance of hybrid aluminum matrix composites produced by squeeze casting. The significant die casting parameters chosen for analysis were the squeeze pressure (50, 70, 90 MPa); die preheat temperature (100, 200, 300°C) and duration of pressurization (15, 30, 45 s). Composites containing 10 and 20 % volume fractions of reinforcements were synthesized by infiltrating molten aluminum alloy 6061 into prefabricated porous preforms composed of Al2O3+SiC microparticles. Experiments were conducted by implementing the L933 orthogonal design of Taguchi, where the objective function was to maximize the tensile strength of the castings by appropriate statistical analysis. The results suggested that the production process was successful as the microparticles were evenly distributed within the matrix alloy. The control parameters of squeeze pressure and duration of pressurization were found to be the most significant factors influencing the tensile strength of the castings. As the volume fraction of reinforcements increases in the composites, the duration of pressurization is the most critical factor to enhance the tensile strength. The optimal control settings required to maximize tensile strength were specified with respect to the volume fraction of reinforcements content. The data from statistical experimental design was compared with mathematical predictions and through verification tests, these results were found to be in close agreement.


    Author Information:

    Malomo, B. O.
    Dept. of Mechanical Engineering, Obafemi Awolowo Univ., Ile-Ife,

    Owolabi, H. A.
    Dept. of Mechanical Engineering, Obafemi Awolowo Univ, Ile-Ife,

    Ibitoye, S. A.
    Dept. of Materials Science & Engineering, Obafemi Awolowo Univ., Ile-Ife,

    Adekoya, L. O.
    Dept. of Mechanical Engineering, Obafemi Awolowo Univ., Ile-Ife,


    Stock #: MPC20160054

    ISSN:2165-3992

    DOI: 10.1520/MPC20160054

    Author
    Title The Effect of Production Process Parameters on the Tensile Strength of Squeeze Cast Al2O3+SiC/Al6061 Hybrid Composites
    Symposium ,
    Committee B07