Gaseous assisted powder mixed near dry EDM (GAPMND-EDM) is one of the recent hybrid technologies, which not only enhance the machining performance, but at the same time, high quality products with better surface quality characteristics can also be achieved. In this study, the response parameters were material removal rate, surface finish, micro hardness and residual stress. It was found that the maximum material removal rate (MRR 3.379 mg/min) was achieved with combination of (dielectric) oxygen gas with graphite powder while lowest surface roughness (SR 1.11 μm) was found to be with dielectric argon gas with graphite additives. Highest micro hardness (MH) and lowest residual stress (RS) was 820.30 Vickers hardness number (VHN) and 229 MPa found with dielectric combination of zinc additives with argon gas.
YadavVKKumarPDvivediA.Performance enhancement of rotary tool near-dry EDM of HSS by supplying oxygen gas in the dielectric medium. Mat Manuf Process2019;
34: 1832–1846.
3.
YadavVKKumarPDvivediA.Effect of tool rotation in near-dry EDM process on machining characteristics of HSS. Mat Manuf Process2019;
34: 779–790.
4.
SundriyalSVipinVWaliaRS.Study on influence of metallic powder in near dry electric discharge machining. Strojniški Vestnik – J Mech Engg2020;
66: 243–253.
5.
SundriyalSVipinVWaliaRS.Powder mixed near dry electric discharge machining. Parameter optimization for tool wear rate, advances in unconventional machining and composites.
Singapore:
Springer Nature Singapore Private Ltd, 2020.
6.
SundriyalSVipinVWaliaRS.Near dry and powder mixed near dry electric discharge machining. Int J Engg Adv Technol2019;
9: 1–5.
7.
SundriyalSWaliaRSVipinV, et al.
Investigation on surface finish in powder mixed near dry electric discharge machining method. Mater Today Proc2020;
25: 804–809.
8.
SundriyalSVipinVWaliaRS.Experimental investigation on micro-hardness of EN-31 die steel in powder mixed near dry electric discharge machining method. Strojniški Vestnik – J Mech Engg2020;
66: 184–192.
9.
SundriyalSYadavJWaliaRS, et al.
Thermal-physical based modeling of material removal in powder mixed near dry electric discharge machining. J Mat Engg Perform. Epub ahead of print 2020. DOI: 10.1007/s11665-020-05110-3.
10.
TahsinTOHamidullahYNihalE, et al.
Particle migration and surface modification on Ti6Al4V in SiC powder mixed electrical discharge machining. J Manuf Process2018;
31: 744–775.
LiLQZhaoWSDiSC, et al.
Experimental study on electrical discharge machining in gas. JME2006;
42: 203.
13.
KunledaMMiyoshiYTakayaT, et al.
High speed 3D milling by dry EDM. CIRP2003;
52: 147–150.
14.
LiqingLYingjieS.Study of dry EDM with oxygen-mixed and cryogenic cooling approaches. Procedia CIRP2013;
6: 344–350.
15.
TaoJShihAJNiJ.Experimental study of the dry and near-dry electrical discharge milling processes. J Manuf Sci Eng Trans ASME2008;
130: 1–8.
16.
PattabhiramanAMarlaDKapoorSG.Atomized dielectric spray-based electric discharge machining for sustainable manufacturing. J Mic Nan Manuf ASME2015;
3: 1–8.
17.
ZouRYuZYanC, et al.
Micro electrical discharge machining in nitrogen plasma jet. Prec Engg2018;
51: 198–207.
18.
LinY-CHungJ-CChowH-M, et al.
Machining characteristics of a hybrid process of EDM in gas combined with ultrasonic vibration and AJM. Procedia CIRP2016;
42: 167–172.
19.
DhakarKDvivediA.Parametric evaluation on near-dry electric discharge machining. Mat Manuf Process2016;
31: 413–421.
20.
MarashiHJafarlouDMSarhanAAD, et al.
State of the art in powder mixed dielectric for EDM applications. Prec Engg2016;
46: 11–33.
21.
WongYSLimLCRahumanI, et al.
Near-mirror-finish phenomenon in EDM using powder-mixed dielectric. J Material Process Technol1998;
79: 30–40.
22.
FongTYChenFC.Investigation into some surface characteristics of electrical discharge machined SKD-11 using powder-suspension dielectric oil. J Mat Process Technol2005;
170: 385–391.
23.
TzengYFLeeCY.Effects of powder characteristics on electro discharge machining efficiency. Int J Adv Manuf Technol2001;
17: 586–592.
24.
BaiXZhangQHYangTY, et al.
Research on material removal rate of powder mixed near dry electrical discharge machining. Int J Adv Manuf Technol2013;
68: 1757–1766.
25.
BaiXZhangQHZhangJH, et al.
Machining efficiency of powder mixed near dry electrical discharge machining based on different material combinations of tool electrode and workpiece electrode. J Manuf Process2013;
15: 474–482.
26.
PecasPHenriquesE.Electrical discharge machining using simple and powder-mixed dielectric: the effect of the electrode area in the surface roughness and topography. J Mat Process Technol2008;
200: 250–258.
27.
TallaGGangopadhyaySBiswasCK.Effect of powder suspended dielectric on the EDM characteristics of inconel 625. J Materi Eng Perform2016;
25: 704–717.
28.
KumarSBatraU.Surface modification of die steel materials by EDM method using tungsten powder-mixed dielectric. J Manuf Process2012;
14: 35–40.
29.
SinghJSatsangiPSWaliaRS, et al.
Micro-hardness and machined surface damage study for continuous and discontinuous ultrasonic vibration assisted electrical discharge machining. Mat Manuf Process2011. DOI: 10.1080/10426914.2011.585502.
30.
TallaGGangopadhyaySBiswasCK.Influence of graphite powder mixed EDM on the surface integrity characteristics of inconel 625. Part Sci Technol2017;
35: 219–226.
31.
LiuJFGuoYB.Residual stress modeling in electric discharge machining (EDM) by incorporating massive random discharges. Procedia CIRP2016;
45: 299–302.
32.
KumarSGroverSWaliaRS.Effect of hybrid wire EDM conditions on generation of residual stresses in machining of HCHCr D2 tool steel under ultrasonic vibration. Int J Interact Des Manuf2018;
12: 1119–1137.
33.
NdalimanMBKhanAAAliMY.Influence of electrical discharge machining process parameters on surface micro-hardness of titanium alloy. Proc IMechE,Part B: J Engineering Manufacture2013;
227: 460–464.
34.
NdalimanMBKhanAAAliMY.Influence of dielectric fluids on surface properties of electrical discharge machined titanium alloy. Proc IMechE, Part B: J Engineering Manufacture2013;
227: 1310–1316.
35.
NdalimanMBKhanAAAliMY.Formation of nitrides and carbides on titanium alloy surface through EDM. AMR2012;
576: 7–10.
36.
TallaG.Powder-mixed electric discharge machining (PMEDM) of inconel 625. PhD Thesis, National Institute of Technology Rourkela, Odisha, 2016.
37.
RaoPSRamjiKSatyanarayanaB.Effect of wire EDM conditions on generation of residual stresses in machining of aluminum 2014 T6 alloy. Alexand Eng J2016;
55: 1077–1084.
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