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    Volume 48, Issue 4 (November 2018)

    Microdrilling of AA (6351)-SiC-B4C Composite Using Hybrid Micro-ECDM Process

    (Received 20 March 2018; accepted 31 May 2018)

    Published Online: 30 November 2018

    CODEN: JTEVAB

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    Abstract

    In the present work, the microdrilling of a metal matrix composite (MMC) is performed by a combination of microelectrical discharge and electrochemical machining (the hybrid micro-ECDM process). The difficulties on machining the cohesive regions on the composite are studied through the control of machining parameters. The kerf/side gap of the holes, energetic regimes on the machined surface, and the surface texture are analyzed through optical microscope, scanning electron microscope, and energy dispersive spectroscopic images. From the observed results, it is found that the machining time increases with an increase in the discharge current and decrease in voltage. The fluctuations in material removal and the eccentricity towards the microdrill are also due to the change in current amplitude. Further, the formation of recast layer and the micropores on the machined surface are analyzed, and it is found that they are not completely eliminated but can be reduced with a change in process parameters.

    Author Information:

    Uthayakumar, M.
    Faculty of Mechanical Engineering, Kalasalingam University, KrishnankoilTamil Nadu,

    Thirumalai Kumaran, S.
    Faculty of Mechanical Engineering, Kalasalingam University, KrishnankoilTamil Nadu,

    Adam Khan, M.
    Faculty of Mechanical Engineering, Kalasalingam University, KrishnankoilTamil Nadu,

    Skoczypiec, Sebastian
    Institute of Production Engineering, Cracow University of Technology, Krakow,

    Bizon, Wojciech
    Institute of Production Engineering, Cracow University of Technology, Krakow,


    Stock #: JTE20180216

    ISSN:0090-3973

    DOI: 10.1520/JTE20180216

    Author
    Title Microdrilling of AA (6351)-SiC-B4C Composite Using Hybrid Micro-ECDM Process
    Symposium ,
    Committee D30