Mohanty, Shalini ORCID: https://orcid.org/0000-0002-0424-792X, Kumar, Vishnu, Das, Alok Kumar and Dixit, Amit Rai (2019) Surface modification of Ti-alloy by micro-electrical discharge process using tungsten disulphide powder suspension. Journal of Manufacturing Processes, 37. pp. 28-41. ISSN 1526-6125 (Print), 2212-4616 (Online) (doi:10.1016/j.jmapro.2018.11.007)

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Abstract

This work aims to produce a hard and solid-lubricating layer over Ti6Al4V work piece surface through μ-EDM process. Deionised water mixed with tungsten disulphide (WS2) powder (average particle size: 15 μm) was used as dielectric medium and brass rod of diameter 800 μm was used as the tool. Various responses such as micro-hardness (HV), recast layer thickness (RLT), material deposition rate (MDR), and surface roughness (SR) were measured and correlated with FESEM images, EDS, XRD and EPMA results. The results indicated the formation of various intermetallic compounds on the modified surface. A higher MDR (0.049 mm3/min) was found at maximum powder content of 12 g/L. There is an improvement in micro-hardness from 421.38 HV to 881.34 HV when compared to that of the base material (417.61 HV). Maximum recast layer thickness of 13.11 μm was obtained at parameter settings of 12 g/L, 60 V and 70% duty factor. Wear test was performed and found that the specific wear rate is decreased as compared to that of the base material.

Item Type:	Article
Uncontrolled Keywords:	Micro-EDM, WS2 powder, EDM coating, FESEM, XRD, specific wear
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Engineering (ENG) Faculty of Engineering & Science
Last Modified:	01 Jul 2025 12:38
URI:	https://gala.gre.ac.uk/id/eprint/49459

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