Surface Modification of Ti-6Al-4V Alloy by Electrical Discharge Coating Process Using Partially Sintered Ti-Nb Electrode

Prakash, Chander; Singh, Sunpreet; Pruncu, Catalin I.; Mishra, Vinod; Królczyk, Grzegorz; Pimenov, Danil Yurievich; Pramanik, Alokesh

doi:10.3390/ma12071006

Cited by 105 publications

(47 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental researches are at initial stages regarding the surface modification through EDM in context of biocompatibility. EDM has been used for coating [26,34,35], particle migration [36,37], layer quality improvement [30,38,39], and nano-surface treatment [30,[40][41][42] for biomedical implants surface treatment of titanium alloys [43].…”

mentioning

confidence: 99%

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

View full text Add to dashboard Cite

Surface modification is given vital importance in the biomedical industry to cope with surface tissue growth problems. Conventionally, basic surface treatment methods are used which include physical and chemical deposition. The major drawbacks associated with these methods are excessive cost and poor adhesion of coating with implant material. To generate a bioactive surface on an implant, electric discharge machining (EDM) is a promising and emerging technology which simultaneously serves as machining and surface modification technique. Besides the surface topology, implant material plays a very important role in surgical applications. From various implant materials, titanium (Ti6Al4V ELI) alloy is the best choice for long-term hard body tissue replacement due to its superior engineering, excellent biocompatibility and antibacterial properties. In this research, EDM’s surface characteristics are explored using Si powder mixed in dielectric on Ti6Al4V ELI. The effect of powder concentration (5 g/L, 10 g/L and 20 g/L) along with pulse current and pulse on time is investigated on micro and nanoscale surface topography. Optimized process parameters having a 5 g/L powder concentration result in 2.76 μm surface roughness and 13.80 μm recast layer thickness. Furthermore, a nano-structured (50–200 nm) biocompatible surface is fabricated on the surface for better cell attachment and growth. A highly favourable carbon enriched surface is confirmed through EDS which increases adhesion and proliferation of human osteoblasts.

show abstract

mentioning

confidence: 99%

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

View full text Add to dashboard Cite

show abstract

“…They reported that both grinding and etching-grinding techniques removed the recast layer, and hence improved the surface integrity. Prakash et al [16] proposed altering the EDM process for coating TiO 2 -TiC-NbO-NbC on Ti-64. They reported that this process improved the mechanical properties on the machined surface.…”

mentioning

confidence: 99%

Modeling of Material Removal Rate and Surface Roughness Generated during Electro-Discharge Machining

et al. 2019

View full text Add to dashboard Cite

This study reports on the numerical model development for the prediction of the material removal rate and surface roughness generated during electrical discharge machining (EDM). A simplified 2D numerical heat conduction equation along with additional assumptions, such as heat effect from previously generated crater on a subsequent crater and instantaneous evaporation of the workpiece, are considered. For the material removal rate, an axisymmetric rectangular domain was utilized, while for the surface roughness, a rectangular domain where every discharge resides at the end of previous crater was considered. Simulated results obtained by solving the heat equation based on a finite element scheme suggested that results are more realistic by considering instantaneous evaporation of the material from the workpiece and the effect of residual heat generated from each spark. Good agreement between our model and previously published data validated the newly proposed models and demonstrate that instantaneous evaporation, as well as residual heat, provide more realistic predictions of the EDM process. Machines 2019, 7, 47 2 of 17 model where the problem of heat conduction for both infinite and semi-infinite bodies with a constant heat source was solved. DiBitonto et al. [7] developed a point heat source cathode erosion model. Since spherical symmetry was considered in their model, the heat transfer equation in spherical coordinates was implemented. In their model, the constant cathode energy fraction of 0.183 was assumed. In their subsequent study [8], they developed an anode erosion model, by assuming a disk heat source. Beck et al.[9] developed a model to find the temperature distribution of a semi-infinite cylinder with a constant heat source and an insulated boundary. Since this model was not developed particularly for the EDM process, the heat fraction to the workpiece is not considered.Process performances of EDM have been investigated by many researchers. D'Urso et al.[10] defined a process index based on process parameters and material properties to analyze the process and geometric indexes of micro-EDM process. D'Urso and Ravasio [11], based on a material-technology index (MTI), studied the process performance of micro-EDM. Tsai and Masuzawa [12] analyzed the electrode wear of different electrode materials in a micro-EDM process. Based on experimental results, a new wear resistance index based on modified boiling and melting points for the evaluation of erosion performance was proposed. Marafona and Araujo [13] proposed an additive model to investigate the influence of hardness on the material removal rate and surface roughness. Alshemary et al. [14] studied effects of different process parameters on fabricating cylindrical holes by wire-EDM. Mandal et al. [15] investigated the surface integrity of wire-EDM. They reported that both grinding and etching-grinding techniques removed the recast layer, and hence improved the surface integrity. Prakash et al. [16] proposed altering the EDM process for coating TiO 2 -T...

show abstract

“…Authors have proved that the application of an abrasive machining tool equipped with the ultraviolet-curable resin bonding during lapping process enabled an approximately 10% lower surface roughness parameter Ra and 25% less weight loss of the workpiece than those obtained in the iron plate lapping process. Prakash et al [4], in their study, employed two methods (electric discharge coating (EDC) and electric discharge machining processes (EDM)) to coat a composite layer TiO 2 -TiC-NbO-NbC on the Ti-64 alloy. The conducted research revealed that the application of the EDC process with a high peak current and high Nb-powder concentration enabled the formation of a crack-free thick layer (215 µm) on the workpiece surface.…”

Section: Ofmentioning

confidence: 99%

Advances in Hard–to–Cut Materials: Manufacturing, Properties, Process Mechanics and Evaluation of Surface Integrity

2020

View full text Add to dashboard Cite

The rapid growth of a modern industry results in a growing demand for construction materials with excellent operational properties. However, the improved features of these materials can significantly hinder their manufacturing, therefore they can be defined as hard–to–cut. The main difficulties during the manufacturing/processing of hard–to–cut materials are attributed to their high hardness and abrasion resistance, high strength at room or elevated temperatures, increased thermal conductivity, as well as their resistance to oxidation and corrosion. Nowadays the group of hard–to–cut materials includes the metallic materials, composites, as well as ceramics. This special issue, “Advances in Hard–to–Cut Materials: Manufacturing, Properties, Process Mechanics and Evaluation of Surface Integrity” provides a collection of research papers regarding the various problems correlated with hard–to–cut materials. The analysis of these studies reveals primary directions regarding the developments in manufacturing methods, and the characterization and optimization of hard–to–cut materials.

show abstract

Surface Modification of Ti-6Al-4V Alloy by Electrical Discharge Coating Process Using Partially Sintered Ti-Nb Electrode

Cited by 105 publications

References 40 publications

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

Modeling of Material Removal Rate and Surface Roughness Generated during Electro-Discharge Machining

Advances in Hard–to–Cut Materials: Manufacturing, Properties, Process Mechanics and Evaluation of Surface Integrity

Contact Info

Product

Resources

About