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Modeling of Process Parameters for Surface Roughness and Analysis of Machined Surface in WEDM of Al/SiC-MMC

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Abstract

Wire electric discharge machining (WEDM) is a newly emerging non-traditional technology for machining MMCs. In the present study, an attempt has been made to investigate the effect of WEDM parameters such as pulse on time, pulse off time, peak current, spark gap voltage, wire feed rate and wire tension on the surface roughness height (Ra) during WEDM of particulate silicon carbide aluminum metal matrix composites (Al/SiC-MMC). The RSM based Box–Behnken design is employed for experimental investigation. Utilized the acquired results, a quadratic regression model for surface roughness height (Ra) has been developed. An attempt has been made to optimize the process parameters for surface roughness height (Ra). To validate, confirmation experiments have been carried out and predicted results have been found to be in good agreement with experimental findings. The surface morphology of machined surfaces has also been studied using scanning electron microscope. Various surface defects and their possible reasons have been discussed.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Baba Banda Singh Bahadur Engineering College, Fatehgarh Sahib, Punjab, 140407, India

    Harmesh Kumar

  2. Department of Mechanical Engineering, PEC University of Technology (Formerly, Punjab Engineering College), Chandigarh, 160012, India

    Alakesh Manna

  3. Department of Mechanical Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Punjab, 148106, India

    Rajesh Kumar

Authors
  1. Harmesh Kumar
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  2. Alakesh Manna
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  3. Rajesh Kumar
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Correspondence to Harmesh Kumar.

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Kumar, H., Manna, A. & Kumar, R. Modeling of Process Parameters for Surface Roughness and Analysis of Machined Surface in WEDM of Al/SiC-MMC. Trans Indian Inst Met 71, 231–244 (2018). https://doi.org/10.1007/s12666-017-1159-x

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  • DOI: https://doi.org/10.1007/s12666-017-1159-x

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