SURFACE MODIFICATION BY ELECTRO-DISCHARGE MACHINING USING POWDER METALLURGY ELECTRODE: A REVIEW

S. V. V. N. Siva Rao, Tharra Bhavani, Rahul Kanti Nath, Pabitra Maji, Subrata Kumar Ghosh and John Deb Barma
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S. V. V. N. Siva Rao: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India
Tharra Bhavani: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India
Rahul Kanti Nath: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India
Pabitra Maji: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India
Subrata Kumar Ghosh: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India
John Deb Barma: Department of Mechanical Engineering, National Institute of Technology Agartala, Barjala, Jirania 799046, Tripura, India

Surface Review and Letters (SRL), 2021, vol. 28, issue 01, 1-16

Abstract: Since the last two decades, many novel techniques have evolved from electro-discharge machining (EDM). Among them, surface modification is one of the rigorously growing technologies by which surface properties can be enhanced by providing a layer having a thickness up to some microns on the workpiece. Existence of tool material on the machined surface after EDM was observed previously. This attribute of EDM makes it a benchmark in surface modification technology. Surface modification in EDM can be done by using different types of electrodes like solid, powder metallurgy (P/M), brush type, etc. This phenomenon can also be acquired by suspending powder particles into dielectric media. However, P/M electrode gives superior results with less effort and also proves to be economical. In this paper, a review has been made on using P/M electrode in surface modification during EDM. The different types of electrodes for surface modification, development of P/M electrode, types of layers generated and surface roughness improvement are critically analyzed. Also, some scope for future works is suggested here.

Keywords: Electro-discharge machining; surface modification; powder metallurgy electrode; hard layer (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X2030004X

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