Simultaneous machining and surface alloying of AISI 1040 steel by electrical discharge machining with boron oxide powders

Özerkan, Hacı Bekir

doi:10.1007/s12206-018-0834-0

Cited by 16 publications

(12 citation statements)

References 16 publications

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“…A small increase in Δ may change the breakdown conditions or even interrupt the discharge; a decrease in Δ impairs the yield of erosion products, reduces the productivity, promotes slag buildup on the electrodes, and facilitates short circuits. Without automatic regulation of the gap, EDM is ineffective [1, 12, 72]. For better regulation, Δ must be maintained above the value at which short circuits appear, and below the value at which breakdown is impossible and idling pulses appear.…”

Section: Discussionmentioning

confidence: 99%

“…The technology application has been extended significantly by the addition of up to six rotating axes [10, 11]. At the same time, the use of new oil-based ecological dielectrics makes the process even more precise and safer for the environment [12, 13, 14, 15, 16]. However, EDM has low productivity and is applicable only for conductive materials [17, 18, 19, 20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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The productivity of electrical discharge machining (EDM) is relatively low owing to the natural laws of electrical erosion. Precise EDM demands uninterrupted control of the discharge gap and adjustment of process parameters. It is particularly critical for processing large workpieces with complex linear surfaces and for materials with threshold conductivities such as the new advanced ceramic nanocomposites Al2O3+TiC and Al2O3+SiCw+TiC(30–40%). In these cases, adequate flushing of erosion products is hampered by the geometry of the working space or by the small value of the required discharge gap, which does not exceed 2.2–2.5 μm. The methods of adaptive control in modern computer numerical control systems of EDM equipment based on measuring the electrical parameters in the working zone have been shown to be ineffective in the cases described above. This study aims to investigate the natural phenomena of material sublimation under discharge pulses for conductive ceramics and nanocomposites. The measured conductivities of the samples are higher than the percolation threshold. However, the question of machinability remains open owing to detected processing interruptions and poor quality of machined surfaces. New knowledge on EDM of conductive ceramics and nanocomposites can improve the final quality of the machined surfaces and productivity of the method by the introduction of advanced monitoring and control methods based on acoustic emissions. The manuscript presents an up-to-date overview and current state of the research on the subject area. The obtained morphology of the samples and discussion of the findings complete the experimental part of the study. The scientific basis for a new type of adaptive control system is provided. This can improve the effectiveness of parameter control for machining conductive ceramics and nanocomposites and contribute to an increase in the EDM performance for the most critical cases.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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“…Özerkan 37 conducted a study on the EDM machining process using boron powder, and obtained good results with the boron implantation on the machined by EDM material surface. The EDM boriding process takes place in short times (µs), simultaneously reconciling boriding with the machining of the workpiece.…”

Section: Resultsmentioning

confidence: 99%

Effects of Sodium Octaborate on AISI 4140 Steel Machined by Die-sinking EDM

et al. 2022

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Researchers are constantly developing processes aiming to improve the properties of metal surfaces, especially related to the wear resistance of components, as in the case of the nitrided layer obtained by die-sinking electrical discharge machining (EDM). Following this line of research, this work investigated the effects of sodium octaborate (Na 2 B 8 O 13 .4H 2 O), mixed into deionized water as a dielectric fluid on AISI 4140 steel surfaces machined by die-sinking EDM. An adapted EDM machine was employed in the process using electrolytic copper as tool. The effects on AISI 4140 steel-machined surfaces were evaluated by optical microscopy, Vickers microhardness, X-ray diffraction, and energy dispersion X-ray spectroscopy (EDS) analyses. The results showed a hardness gain of approximately 146.8% in the modified layer when compared to the AISI 4140 steel (base material). This suggests the formation of a borided layer, such as the Fe 2 B phases identified on sample surfaces, which can be explained by the boron element decomposed from the dielectric solution.

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“…Si powder of 4 g/l concentration provided the best surface quality, whereas 8 g/l Si powder modified the surface structure by generating oxide and carbide layer on the machined surface [24]. Another hybridisation technique of EDM, abrasive powder mixed surface electric discharge machining has been conducted and investigated the influenced parameter on surface properties [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis on Eco-friendly Machining of Ti6Al4V using Powder Mixed with Different Dielectrics in WEDM

Chakraborty

Mitra

Bose

2020

IJAME

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The recent scenario of modern manufacturing is tremendously improved in the sense of precision machining and abstaining from environmental pollution and hazard issues. In the present work, Ti6Al4V is machined through wire EDM (WEDM) process with powder mixed dielectric and analyzed the influence of input parameters and inherent hazard issues. WEDM has different parameters such as peak current, pulse on time, pulse off time, gap voltage, wire speed, wire tension and so on, as well as dielectrics with powder mixed. These are playing an essential role in WEDM performances to improve the process efficiency by developing the surface texture, microhardness, and metal removal rate. Even though the parameter’s influencing, the study of environmental effect in the WEDM process is very essential during the machining process due to the high emission of toxic vapour by the high discharge energy. In the present study, three different dielectric fluids were used, including deionised water, kerosene, and surfactant added deionised water and analysed the data by taking one factor at a time (OFAT) approach. From this study, it is established that dielectric types and powder significantly improve performances with proper set of machining parameters and find out the risk factor associated with the PMWEDM process.

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Simultaneous machining and surface alloying of AISI 1040 steel by electrical discharge machining with boron oxide powders

Cited by 16 publications

References 16 publications

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Effects of Sodium Octaborate on AISI 4140 Steel Machined by Die-sinking EDM

Performance Analysis on Eco-friendly Machining of Ti6Al4V using Powder Mixed with Different Dielectrics in WEDM

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