Particle migration and surface modification on Ti6Al4V in SiC powder mixed electrical discharge machining

Öpöz, Tahsin Tecelli; Yaşar, Hamidullah; Ekmekci, Nihal; Ekmekçi, Bülent

doi:10.1016/j.jmapro.2018.01.002

Cited by 87 publications

(26 citation statements)

References 21 publications

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“…The traces of oxygen (O), carbon (C) and Si confirms particle migration from dielectric to surface. As a result, the surface chemistry and porous recast layer fabricated in this research work are considered as highly favorable for biomedical applications as previously reported in [6,36,41,43]. The decomposed elements formed oxides and carbides are highly likely to enhance surface hardness and bio activity.…”

Section: Resultssupporting

confidence: 60%

“…Moreover, the Si traces in craters confirms the material migration phenomenon controlling machined surface quality. A similar study [36] on Ti6Al4V reported ~4.2 μm at 2A current. However, the current study has improved the surface results by almost 50%.…”

Section: Resultssupporting

confidence: 57%

“…It is reported in the literature that nano-surface characteristics facilitate artificial human body part surface in body environment for osseointegration or bone growth, growth of tissues by building biological interface on the surface for stability [43,47]. It is reported in a number of findings that RLT has direct relation with powder concentration and pulse duration [30,36]. It mainly drives (surface hardness, corrosion resistance) mechanical characteristics of the machined surface.…”

Section: Resultsmentioning

confidence: 99%

“…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].…”

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confidence: 99%

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

et al. 2020

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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.

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Section: Resultssupporting

confidence: 60%

Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2020

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“…The surface integrity of the machined specimen is evaluated in the purview of surface morphology and topographical features [11]. The impact of SiC powder concentration on surface topography, particle deposition, and subsurface structures in the PM-EDM of Ti-6Al-4V-ELI work material was studied, and it was observed that a high suspended particle concentration in dielectric liquid enhance the material transfer mechanism in a particulate form [12]. Flushing mode plays an important role in any EDM operation.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining

Sundriyal

Vipin

Walia

2020

SV-JME

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Near-dry electrical discharge machining (ND-EDM) is an eco-friendly process. In this study, an approach has been made to make the machining process more efficient than ND-EDM with the addition of metallic powder with the dielectric medium to machine EN-31 die steel. Powdermixed near-dry EDM (PMND-EDM) has several advantages over the ND-EDM or conventional electrical discharge machining (EDM) process, such as a higher material removal rate (MRR), fine surface finish (Ra), sharp cutting edge, lesser recast layer, and lower deposition of debris. The output response variables are MRR, Ra, residual stress (RS) and micro-hardness (MH) of the machined surfaces. Further study of the workpiece was performed, and a comparative study was conducted between ND-EDM and PMND-EDM. In this proposed method of machining, the MRR, Ra, and MH increased by 17.85 %, 16.36 %, and 62.69 % while RS was reduced by 56.09 %. Highlights • Experimental investigations have been conducted in the PMND-EDM process. The metallic powder (zinc) as an additive alongwith the mist of a dielectric medium was used for performance enhancements. • In PMND-EDM, the MRR was influenced by powder concentration. The MRR increases with the increase in metallic powder concentration, and the maximum increase in MRR was 17.85 %, as compared to ND-EDM. • The surface finish was improved by 16.36 % in PMND-EDM as the sparking is uniformly distributed among the powder particles, which gives even and uniform machined surfaces. • There was a decrease in residual stress by 56.09 % over the machined surfaces in PMND-EDM as compared to ND-EDM process. • The maximum increase in MH was 62.69 % over the machined surface in PMND-EDM as compared to ND-EDM.

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Machinability and surface morphology investigations of multiwall carbon nanotube reinforced aluminium 7075 metal matrix composite during electrical discharge machining: A grey relational approach

Pradhan,

Tripathy,

Prasad

et al. 2023

Materialwissenschaft Werkst

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Multiwall carbon nanotube buttressed aluminium 7075 metal matrix composite was synthesized through an amended liquid metallurgy method, which consisted semisolid stirring, ultrasonic treatment and squeeze casting. Aim was to investigate its machinability and surface morphology during electrical discharge machining. Variable machining factors were peak current, pulse‐on time and gap voltage, whereas the responses under investigation were electrode wear rate, material removal rate and average surface roughness. Results revealed electrode wear rate, material wear rate and average surface roughness increased on increasing peak current and pulse‐on time, but all these responses behaved inversely with the increase of gap voltage. Average surface roughness reduced by around 44 % on reducing the peak current from 10 A to 4 A and increasing gap voltage from 55 V to 80 V at constant pulse‐on time of 300 μs; however, it increased by around 25 % on reducing the gap voltage from 80 V to 55 V and increasing the pulse‐on time from 100 μs to 300 μs at constant peak current of 10 A. Significance of the process parameters were verified, regression models were developed and morphology of the machined surfaces was studied. Finally, multiple response optimization was conducted following grey relational approach.

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Particle migration and surface modification on Ti6Al4V in SiC powder mixed electrical discharge machining

Abstract: The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.

Cited by 87 publications

References 21 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

Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining

Machinability and surface morphology investigations of multiwall carbon nanotube reinforced aluminium 7075 metal matrix composite during electrical discharge machining: A grey relational approach

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