PSI - Issue 14

Sandeep Das et al. / Procedia Structural Integrity 14 (2019) 119–126

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Sandeep Das et al. / Structural Integrity Procedia 00 (2018) 000–000

Fig.8. EDX spectrum for deposition of TiB 2 in aluminium 5052. peak current ( I P ) 4A, Pulse width ( T ON ) 536 μs, Duty cycle (Ʈ) 50%, Working time 5min. 4. Conclusion In this work, electric discharge-based surface alloying has successfully been carried out by depositing TiB 2 -SiC powder on Al-5052 substrate. The conclusions drawn are  Discharge current of 4A with discharge pulse width of 331,400, 468 and 536 μs can be employed to produce uniform layers of TiB 2 -SiC.  A layer of 90 μm can easily be deposited on the substrate using the electric discharge based alloying process.  The surface roughness value of the substrate after alloying was increased from 0.6 to 5μm. Overall it can be concluded that the electric discharges can be used as an economical and efficient alternative to achieve desired surface properties on industrial parts. However a careful selection of process parameters is essential to obtain required composition of alloying elements. Further research work is in progress in this direction. References Jeswani, M., 1978. Effect of addition of graphite powder to kerosene used as a dielectric fluid in electrical discharge machining. Wear 51(2), 227– 236. Kruth, J., Stevens, L., Froyen, L., Lauwers, B., 1995. Study of the white layer of a surface machined by Die-sinking Electro-discharge Machining. CIRPAnnals 44(1), 169–172. Kunieda, M., Takaya T., Nakano S., 2004. Improvement of Dry EDM Characteristics using Piezoelectric Actuator. CIRPAnnals 53 (1), 183–186. Samuel, M., and Philip, P., 1996. Properties of compacted, pre-sintered and fully sintered electrodes produced by powder metallurgy for electrical discharge machining. Indian Journal of Engineering and Materials Sciences 3, 229–233. Tsunekawa, Y., Okumiya, M., Mohr, N., 1994. Surface modification of aluminum by electrical discharge alloying. Material Science and Engineering A174, 193–198. Uan, J., Lin, H., Stambekova, K., 2012. Surface modification of 5083 Al alloy by electric discharge alloying with a 75% Si-Fe alloy electrode. Applied Surface Science 258 (10), 4483–4488.