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    Volume 5, Issue 1 (March 2016)

    Aging Behavior of Pb Alloy–45 Vol. % Fly Ash Microballoon Composites

    (Received 14 June 2015; accepted 18 September 2015)

    Published Online: 10 March 2016

    CODEN: MPCACD

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    Abstract

    Composites comprising Pb alloys and 45 vol. % of nickel-coated flay ash (FA) microballoons were manufactured by stir casting method. Aging studies were carried out on the Pb alloys and composites in order to investigate the influence of the microballoons' presence on the aging behavior. The Pb matrix alloys and their composites were solution treated at 280°C for 5 h, and water quenched and aged at 60 and 100°C for various times. Aging investigation revealed that the peak hardness attained in the composite is higher than that of the Pb matrix alloy because of the refined structures of the composites in comparison to those of the Pb alloys, the presence of the microballoons, as well as increasing dislocation density in the composites. Also, the existence of FA microballoons in the Pb-0.06 Ca-1.2 Sn alloy results in an accelerating the age hardening kinetics of the composites. However, in case of Pb-0.13Ca -0.3 Sn-0.014 Al and Pb-0.065Ca-1.1 Sn-0.014 Ag based composites, the presence of the microballoons do not significantly affect the time for peak aging.


    Author Information:

    Daoud, A.
    Composite Materials Laboratory, Central Metallurgical Research and Development Institute (CMRDI), Cairo,

    Abou El-Khair, M. T.
    Composite Materials Laboratory, Central Metallurgical Research and Development Institute (CMRDI), Cairo,

    Fairouz, F.
    Composite Materials Laboratory, Central Metallurgical Research and Development Institute (CMRDI), Cairo,

    Mohammed, E.
    Composite Materials Laboratory, Central Metallurgical Research and Development Institute (CMRDI), Cairo,

    Lotfy, A.
    Composite Materials Laboratory, Central Metallurgical Research and Development Institute (CMRDI), Cairo,

    Rohatgi, P. K.
    Materials Department, Univ. of Wisconsin–Milwaukee, Milwaukee, WI


    Stock #: MPC20150033

    ISSN:2165-3992

    DOI: 10.1520/MPC20150033

    Author
    Title Aging Behavior of Pb Alloy–45 Vol. % Fly Ash Microballoon Composites
    Symposium ,
    Committee D30