Experimental Investigation on Wire Electric Discharge Machining of Biodegradable AZ91 Mg Alloy

Urtekin, Levent; Özerkan, Hacı Bekir; Çoğun, Can; Genç, Asım; Esen, Ziya; Bozkurt, Fatih

doi:10.1007/s11665-021-05939-2

Cited by 18 publications

(6 citation statements)

References 9 publications

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“…Wire EDM uses a thin wire as a tool to cut away material controlled by CNC, while electric discharge milling uses a rotating tool that follows a CNC code specified path, and electric grinding uses a conductive wheel as a tool to remove material. Recent advances have seen micro-EDM tools being made of hot-pressed copper composites to cut AISI D3 steel and its alloys, Inconel and slicing of silicon wafers <200 μm [ 78 , 79 , 80 , 81 ]. Despite the ability to cut very hard materials with complex shapes, there can be serious issues with pores, cracks, surface pits, and holes that affect morphology.…”

Section: Alternative Micro-feature Fabrication Processesmentioning

confidence: 99%

Electropolishing and Shaping of Micro-Scale Metallic Features

2022

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Electropolishing (EP) is most widely used as a metal finishing process. It is a non-contact electrochemical process that can clean, passivate, deburr, brighten, and improve the biocompatibility of surfaces. However, there is clear potential for it to be used to shape and form the topology of micro-scale surface features, such as those found on the micro-applications of additively manufactured (AM) parts, transmission electron microscopy (TEM) samples, micro-electromechanical systems (MEMs), biomedical stents, and artificial implants. This review focuses on the fundamental principles of electrochemical polishing, the associated process parameters (voltage, current density, electrolytes, electrode gap, and time), and the increasing demand for using environmentally sustainable electrolytes and micro-scale applications. A summary of other micro-fabrication processes, including micro-milling, micro-electric discharge machining (EDM), laser polishing/ablation, lithography (LIGA), electrochemical etching (MacEtch), and reactive ion etching (RIE), are discussed and compared with EP. However, those processes have tool size, stress, wear, and structural integrity limitations for micro-structures. Hence, electropolishing offers two-fold benefits of material removal from the metal, resulting in a smooth and bright surface, along with the ability to shape/form micro-scale features, which makes the process particularly attractive for precision engineering applications.zx3

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Section: Alternative Micro-feature Fabrication Processesmentioning

confidence: 99%

Electropolishing and Shaping of Micro-Scale Metallic Features

2022

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“…Die-sinking electrical discharge machining (EDM) is a commonly used machining process for precise machining of titanium, tungsten, super alloys, composites and ceramics. [1][2][3][4] In EDM, the electrode and the workpiece remain submerged in a dielectric fluid, and they are connected to the appropriate terminals of a power source. During machining, a series of repetitive sparks occurs between the electrode and the workpiece which melts the workpiece material causing its removal.…”

Section: Introductionmentioning

confidence: 99%

Evaluating machining performance of acrylonitrile-butadiene-styrene (ABS) based electrical discharge machining (EDM) electrodes fabricated by fused deposition modelling (FDM) followed by a novel metallization method

Equbal

Ahmad

Badruddin

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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In the present study machining performance of a novel ABS P400 based EDM electrode is experimentally investigated. Three EDM parameters that is, current ( I), pulse on time ( Ton) and pulse off time ( Toff), each at three levels, are considered, and mild steel is machined using these electrodes according to the response surface methodology (RSM) based face-centred central composite design (FCCCD). Machining performances such as material removal rate ( MRR), tool wear rate ( TWR) and surface roughness ( SR) are measured. Experimental results are analysed using analysis of variance (ANOVA), response graphs and 3D surface plots. Current is found to be the dominating parameter for MRR, TWR and SR. The optimal combination of EDM parameter for multi-performance is determined using teaching-learning based optimization (TLBO) algorithm. The effectiveness of the new electrodes is established by comparing their machining performances with the already developed electrode at the same machining parameter setting. MRR resulting from the new electrode and also its TWR are found to be in good agreement with those of already produced electrodes. However, SR of the machined surface using new electrodes is found to be relatively higher.

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“…Since there is no physical contact between the workpiece and the electrode in EDM, when voltage is applied between the electrode and the workpiece, metal-based materials can be easily shaped with the formed electric arc by ionizing the dielectric due to the high potential difference. 9 Kutlu et al 10 investigated the machinability of zirconia matrix titanium nitride reinforced composites with EDM. They obtained material removal rate (MRR) higher than 1 mm 2 /min and low surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the machinability of B₄C+TiB₂/Al 2024 composite manufactured by powder metallurgy with EDM

Özerkan

Subaşı

Pul

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, the machinability of B4C and TiB2 reinforced Al 2024 based composites produced by powder metallurgy was investigated with EDM (Electro Discharge Machining) method using two different copper electrodes. For this purpose, composite samples were produced at 6% TiB2+12% B4C reinforcement ratios. Then, scanning electron microscopy images were taken to examine the microstructure of the composite samples. Also EDAX analyzes were performed during SEM images. In EDM machinability experiments of the composite material two different electrodes; pure copper and beryllium copper were used. The experiments were carried out using three different current (I) and arc pulse on time ( ton) and two different arc pulse off time ( toff) parameters. As a result of EDM experiments, roughness measurements of the machined surfaces were made and SEM images of the machined surfaces were taken again. According to the experimental findings, material removal rate increased in machining with CuBe tool compared to machining made with pure Cu and CuBe tools showed higher wear tendency than Cu tool sunder the same machining conditions and roughness values in CuBe electrodes were lower than machining made with pure Cu. And the roughness values of CuBe are lower than the machinings with pure Cu.

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Experimental Investigation on Wire Electric Discharge Machining of Biodegradable AZ91 Mg Alloy

Cited by 18 publications

References 9 publications

Electropolishing and Shaping of Micro-Scale Metallic Features

Electropolishing and Shaping of Micro-Scale Metallic Features

Evaluating machining performance of acrylonitrile-butadiene-styrene (ABS) based electrical discharge machining (EDM) electrodes fabricated by fused deposition modelling (FDM) followed by a novel metallization method

Investigation of the machinability of B₄C+TiB₂/Al 2024 composite manufactured by powder metallurgy with EDM

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Experimental Investigation on Wire Electric Discharge Machining of Biodegradable AZ91 Mg Alloy

Cited by 18 publications

References 9 publications

Electropolishing and Shaping of Micro-Scale Metallic Features

Electropolishing and Shaping of Micro-Scale Metallic Features

Evaluating machining performance of acrylonitrile-butadiene-styrene (ABS) based electrical discharge machining (EDM) electrodes fabricated by fused deposition modelling (FDM) followed by a novel metallization method

Investigation of the machinability of B4C+TiB2/Al 2024 composite manufactured by powder metallurgy with EDM

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Investigation of the machinability of B₄C+TiB₂/Al 2024 composite manufactured by powder metallurgy with EDM