Employing severe plastic deformation to the processing of electrical discharge machining electrodes

Marashi, Houriyeh; Jafarlou, Davoud M.; Sarahan, A.A.D.; Mardi, N.A.

doi:10.1016/j.precisioneng.2016.05.012

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…It is observed during the machining of the Inconel with copper electrode that both TWR and SR are reasonably reduced when graphite dust is mixed with the dielectric [8,47]. Marashi et al [48] observed that MRR is proportionally increased with powder concentration (gm/l) to some extent and then again fell slightly, when machining is performed at t on = 25 μs. The variation in MRR with pulse-on time also shows the similar trend.…”

Section: Molybdenummentioning

confidence: 99%

“…The incorporation of these additives into the dielectric modifies both electrical and nonelectrical properties [8]. Marashi et al [48] concluded that additive-mixed medium can develop more spark energy, but wide spark gap and short spark length, which often leads to poor surface integrity. However, when these additives are added with water and gas, they become suitable dielectric medium for high-temperature machining.…”

Section: Breakdown Strengthmentioning

confidence: 99%

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Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Das

Paul

Doloi

2020

J Braz. Soc. Mech. Sci. Eng.

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Low removal rate, high power consumption, and dependency on conventional fuels (kerosene as a dielectric) are some premier issues that keep the sustainability index of EDM low, though it has huge acceptability and popularity mostly in aviation sectors and biomedical instrumentation to machine some extensively hard ferrous and nonferrous metal/metal alloys. Besides these, the thermal agitation inside the fusion/machining zone partially burns the dielectrics and tool-workpiece-metal, which evolve some oxides/monoxides. These evolved gases promote an unhygienic breathing atmosphere, which is very much harmful to the operator's health. Sometimes because of inadequate flushing pressure and velocity, carbon particles deposited inside the crater makes the spark unstable and releases carbon monoxide when the temperature exceeds its melting point. According to ISO 14000, every manufacturing process must be comprised of the sustainability criteria, which maintains a compromised balance between the economic, environmental, and social aspects, including the issue of the operator's health. But in real practices, it is very tough to maintain a stoichiometric balance between all these constraints. The article intensely focuses on the issue of emergence of gases during machining and tries to promote the utility of some alternative vegetable oil-based dielectrics, which are experimentally justified as a potent alternative of conventional kerosene. Apart from these, it includes some comparative talks on dielectric nature and their impacts on the responses and surface properties. Finally, this article highlights some compromise solutions which are probably capable of mitigating the hurdles to some extent, so that the sustainable machining can be encouraged in real sense.

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Section: Molybdenummentioning

confidence: 99%

Section: Breakdown Strengthmentioning

confidence: 99%

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Das

Paul

Doloi

2020

J Braz. Soc. Mech. Sci. Eng.

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“…В работе [9] выделены зоны деформации, способствующие образованию трещин. Вместе с тем в исследовании [10] растрескивание объясняется вытягиванием зёрен в направлении сдвига и образованием ламеллярной, а не равноосной структуры.…”

Section: Doi: 1025206/2310-9793-2018-6-1-148-154unclassified

Investigation of the Influence Wedm on Morphology, Roughness and Cracking of Surfaces Refractory Metals

Bobkov¹,

Федоров

Polonyankin

et al. 2018

DSMM

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Аннотация. Цирконий, ниобий и ванадий обладают высокой стоимостью, что обусловливает актуальность проблемы экономичной обработки и минимизации отходов при производстве изделий из этих тугоплавких металлов. Целью данной работы является исследование качества поверхностного слоя после проволочной электроэрозионной обработки (ПЭЭО). Для достижения цели необходимо изучить морфологию, а также трещинообразование в поверхностном слое на примере тугоплавких металлов, таких как цирконий, ниобий и ванадий. Исследования поверхностного слоя производились методами растровой электронной микроскопии и профилометрии. В статье представлены результаты исследования влияния режимов ПЭЭО на морфологию, шероховатость, а также трещинообразование поверхности циркония, ниобия и ванадия. Отмечено, что тугоплавкие металлы обрабатываются хуже, чем стали, медные и алюминиевые сплавы, хотя по морфологии обработанной поверхности практически ничем от них не отличаются.

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“…When it comes to calculating the machinability of UFG/NS materials, comparing these findings with CG materials would be a logical choice, because they are made of the same material but still show different physical behavior. 11,[38][39][40] This research aims to study the machinability of UFG/NS commercially pure Cu in machining. These materials were conducted using the ECAP process to reach UFG/NS conditions.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Machinability of pure copper before and after processing by severe plastic deformation method

Özkavak

Göde

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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For using ultrafine-grained metals and alloys in industry, further machining sequences and studying their possible effects are necessary to attain these products in their ultimate dimensions. In this work, the machinability of ultrafine-grained pure copper and the corresponding coarse-grained counterpart investigated systematically. The results showed that the processed copper could be machined as efficiently as its initial one. Also, the machining of the Cu sample with the polycrystalline diamond tools requires much less force than tungsten carbide tools. The produced cutting forces were smaller for the processed copper as compared to the initial copper. Also, similar tool wear mechanisms were detectable for the copper specimen before and after the process. Chip morphology altered less through the machining, and the surface quality enhanced during machining the ultrafine-grained copper. Eventually, the polycrystalline diamond tool increased the surface roughness of initial and processed specimens since it caused less than 50% roughness compared to the tungsten carbide tool.

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Employing severe plastic deformation to the processing of electrical discharge machining electrodes

Cited by 14 publications

References 35 publications

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Investigation of the Influence Wedm on Morphology, Roughness and Cracking of Surfaces Refractory Metals

Machinability of pure copper before and after processing by severe plastic deformation method

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