Mechanical performance of in-situ TiC-TiB 2 composite coating deposited on Ti-6Al-4V alloy by powder suspension electro-discharge coating process

Tijo, D.; Masanta, Manoj

doi:10.1016/j.surfcoat.2017.08.048

Cited by 40 publications

(19 citation statements)

References 29 publications

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“…This provided relatively less thermal stress than in conventional EDM. Tijo et al [45] proposed the use of Ti and B4C powder-mixed electrical discharge machining with a coating of Ti-6Al-4V. The results showed the possibility of improving the microhardness of the external layer (up to three times) and a significant reduction in the surface wear rate (up to seven times).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Reduced Graphene Oxide Flakes in the Dielectric on Surface Characteristics and Material Removal Rate in EDM

Świercz¹,

Oniszczuk-Świercz²

2019

Materials

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Electrical discharge machining (EDM) is an advanced technology used to manufacture difficult-to-cut conductive materials. However, the surface layer properties after EDM require additional finishing operations in many cases. Therefore, new methods implemented in EDM are being developed to improve surface characteristics and the material removal rate. This paper presents new research about improving the surface integrity of 55NiCrMoV7 tool steel by using reduced graphene oxide (RGO) flakes in the dielectric. The main goal of the research was to investigate the influence of RGO flakes in the dielectric on electrical discharge propagation and heat dissipation in the gap. The investigation of the influence of discharge current I and pulse time ton during EDM with RGO flakes in the dielectric was carried out using response surface methodology. Furthermore, the surface texture properties and metallographic structure after EDM with RGO in the dielectric and conventional EDM were investigated and described. The obtained results indicate that using RGO flakes in the dielectric leads to a decreased surface roughness and recast layer thickness with an increased material removal rate (MRR). The presence of RGO flakes in the dielectric reduced the breakdown voltage and allowed several discharges to occur during one pulse. The dispersion of the discharge caused a decrease in the energy delivered to the workpiece. In terms of the finishing EDM parameters, there was a 460% reduction in roughness Ra with a uniform distribution of the recast layer on the surface, and a slight increase in MRR (12%) was obtained.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Reduced Graphene Oxide Flakes in the Dielectric on Surface Characteristics and Material Removal Rate in EDM

Świercz¹,

Oniszczuk-Świercz²

2019

Materials

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“…Finally, the copper alloy was coated on the titanium (Ti-6Al-4V) material which has several applications. Popular coating techniques were studied from the literature review and EDC was selected among the coatings [8][9][10][11][12]. Figure 3 shows the different types of coatings available.…”

Section: Introductionmentioning

confidence: 99%

“…Popular coating techniques were studied from the literature review and EDC was selected among the coatings [8][9][10][11][12]. Figure 3 shows the different types of coatings available.…”

Section: Introductionmentioning

confidence: 99%

“…A study on the related work carried out by other researchers is summarized here. Tijo and Masanta [8] deposited a composite coating of TiC and TiB2 with improved hardness (three times) and wear properties (seven times) on the coated surface as compared to that of the substrate (Ti-6Al-4V). As the value of peak current and duty factor increases, the rate of deposition increases, but after that, some values of peak current, deposition rate starts decreasing owing to high discharge energy.…”

Section: Introductionmentioning

confidence: 99%

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Formation and Optimization of Electrical Discharge Coatings Using Conventional Electrodes

et al. 2021

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An emerging topic is electrical discharge (ED) coating with its application on complex shapes and cavities to repair components or act as functional coatings. Because it is a variant process of an electric discharge machine (EDM) with the ability to coat on electrically conductive substrates, there is a possibility that next-generation electrical discharge machining components may exploit the attachment phenomenon to enhance recast layer properties. Previously, researchers have obtained ED coating by mixing the powder in a dielectric medium and/or by using powder metallurgy electrodes. In this work, primarily, an insight in the formation of ED coating on-die sinks electrical discharge machine, using conventional electrode materials viz., bronze on titanium alloy (Ti-6Al-4V) is made. The bronze electrode on the titanium substrate obtained a crack-free copper coating of ~20 microns thickness. In order to perform the experiments, three combinations were made using five parameters: current (Amps), ton (µs), Toff (µs), duty cycle (%), and flushing pressure as constant (bar). After obtaining the coating, a combination of input parameters was selected by optimizing the output performance parameters, viz., the electrical discharge deposition rate, coating thickness, micro-cracks, and elemental coating composition. Secondarily, different optimization techniques viz., grey relational analysis, the technique for order of preferences by similarity to ideal solution, −nD angle method and information divergence method were implemented to find out the suitable combination of parameters where the latter two methods were introduced for the first time in this area of EDM optimization. A study was conducted to check whether the latter two methods are optimization techniques or multi-criteria decision-making techniques. The optimization of existing reactor types and the development of new reactors in wastewater treatment through EDC, by which energy could be saved by replacing the conventional techniques.

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“…There are several methods to apply a protective coating onto Ni-based superalloys including ion implantation [13], electro-discharge coating [14,15], high velocity oxy-fuel (HVOF) [16], laser surface modification [17,18], plasma spraying (APS, LPPS, VPS, AXPS) [19] and pack cementation. Amongst different surface modification routes, the hot dip coating process is an advantageous way because of its being simple, fast and cost effective [20].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and hot corrosion behavior of hot dip siliconized coating on Ni-base superalloy IN738LC

Targhi

Omidvar

Hadavi

et al. 2020

Mater. Res. Express

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Nickel-based superalloys are widely used at elevated temperature applications because of their high corrosion and oxidation resistance characteristics as well as high stability. To improve the hot corrosion resistance of Nickel-based superalloys, different coatings are applied. In this study, nickelbase superalloy Inconel 738LC was coated via a novel hot-dip diffusion siliconizing process and the corrosion behavior was investigated by XRD, SEM and EDS analyses. A sever degradation and poor hot corrosion resistance was detected by the uncoated sample, while the siliconized coated sample possessed high corrosion resistance. It was figured out that the high hot corrosion resistance of the coated sample was due to the formation of SiO 2 protective scale in the surface layer which protects the substrate elements in the hot corrosion environment.

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Mechanical performance of in-situ TiC-TiB 2 composite coating deposited on Ti-6Al-4V alloy by powder suspension electro-discharge coating process

Cited by 40 publications

References 29 publications

Investigation of the Influence of Reduced Graphene Oxide Flakes in the Dielectric on Surface Characteristics and Material Removal Rate in EDM

Investigation of the Influence of Reduced Graphene Oxide Flakes in the Dielectric on Surface Characteristics and Material Removal Rate in EDM

Formation and Optimization of Electrical Discharge Coatings Using Conventional Electrodes

Microstructure and hot corrosion behavior of hot dip siliconized coating on Ni-base superalloy IN738LC

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