Electrical Discharge Machining of Ti6Al4V in Hydroxyapatite Powder Mixed Dielectric Liquid

Ekmekci, Nihal; Ekmekçi, Bülent

doi:10.1080/10426914.2015.1090591

Cited by 74 publications

(27 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is crucial to mention that the alteration on the surfaces with powder mixed EDM is partially due to alteration of the discharge mechanism, which resulted in several secondary discharges leading to particle migration and deposition. This discharge alteration phenomenon was detailed in the authors' previous paper [25]. It can be concluded that the HA mixed EDM with high HA concentration provides very efficient and rich surfaces for enhanced biocompatibility and improved cellular response.…”

Section: Discussionmentioning

confidence: 69%

“…Other EDM process parameters kept constant for all experiments. The machining condition was selected from the previous experimentation as 12µs pulse on duration and 22 A pulse current [25]. As a control, two Ti samples were wet-abraded with # 600 to #1200 SiC abrasive paper followed by polishing with 1µm polishing cloth.…”

Section: Test Samples Preparationmentioning

confidence: 99%

“…They showed that the most suitable parameters are high pulse current and low pulse on duration. In their continuing work, they have indicated that secondary sparks have made deposition more effectively [25]. Recent work on this subject has shown an improved corrosion resistance for β-phase Ti implant by HA mixed EDM.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ti6Al4V Surface Modification by Hydroxyapatite Powder Mixed Electrical Discharge Machining for Medical Applications

Öpöz

Yaşar

Murphy

et al. 2019

International Journal of Advances in Engineering and Pure Sciences

Self Cite

View full text Add to dashboard Cite

Titanium surface modification by the Hydroxyapatite (HA) mixed Electrical Discharge Machining (EDM) is an alternative and promising technique to enhance the biocompatibility and to promote the biological performance in bone, which is dependent on surface properties, such as surface roughness, chemistry, and wettability. HA powder is used for the first time with electrical discharge machining to improve osteoblastic cell activity on the developed surfaces for Ti6Al4V. Different HA concentrations in deionized water were tested as an experimental variable during EDM. Abrasive polishing and electrical discharge machined control surfaces without powder addition also analyzed to compare the results. The surface characteristics of analyzed samples were evaluated by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-Ray Diffractometry (XRD), white light interferometry, and contact angle measurements. The wettability tests suggest that the hydroxyapatite powder mixed EDM'ed surfaces shows highly hydrophilic characteristics compared the other surfaces, abrasive polished and EDM'ed without powder addition in the dielectric. The results from the MTT assay revealed that those surfaces modified using HA powder addition in distilled water dielectric liquid promoted the most significant cell attachment/growth. The results indicate that HA powder mixed EDM offers a promising method for the surface modification of biomaterials such as titanium alloys.

show abstract

Section: Discussionmentioning

confidence: 69%

Section: Test Samples Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Ti6Al4V Surface Modification by Hydroxyapatite Powder Mixed Electrical Discharge Machining for Medical Applications

Öpöz

Yaşar

Murphy

et al. 2019

International Journal of Advances in Engineering and Pure Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, this layer exhibited good corrosion resistance in NaCl aqueous solution [8,9]. Nihal et al [10] used hydroxyapatite powder mixed dielectric liquid and proved that the collision of the powder separates the main discharge which made the surface rich in additives.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of electrical discharge metal matrix composite coating through compacted semi-sintered electrode and its tribological studies

Arun¹,

Yuvaraj²,

Selvarani³

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Electric discharge coating is an alternative process for surface modification/alloying/coating requirements to improve mechanical and metallurgical properties of the materials. The high-pressure compacted electrode is made of the semi-sintered nickel and tungsten during the electric discharging process which influences the material migration towards substrate. In this proecess addtiton of pyrolysis carbon from dielectric togeather with the alloying elements and substrate material results in formation of metal matrix composite coating. It depended on the stabilization pressure of spark which increases the deposition rate of alloying materials and reduces the carbon, brittleness, cracks, voids, blowhole on the surface and made the layer to be desired metallurgical properties. Modified layer shows higher in hardness value of 1100 HV0.5 and reduction in specific wear to 0.082 × 10 −5 mm 3 /Nm compared with uncoated substrate material. Inclusion of the alloying material and reduction of the carbon percentage consequences in self-lubricant properties which alter the wear rate and coefficient of friction. Surfaces topography obtained during alloying, material migration and the mechanism have been characterized through scanning electron microscopy and energy-dispersive X-ray spectroscopy. The wear behaviour has been analysed by using pin-on-disc tribometer.

show abstract

“…The results indicated the possibility of Hydroxyapatite deposition on titanium alloy surfaces by the use of the process. It is possible to switch between the deposition and removal process during the machining and suggest an attractive method for arrangement the shape of the substrate and thickness of the covering Hydroxyapatite layer for future applications [13]. Houriyeh Marashia (2016), had discussed the employment of different powders in Powder Mixed EDM.The machining efficiency is influenced by powder particles such as shape, size, and concentration in the dielectric.Graphite & Aluminum powders improved the efficiency concerning surface quality and MRR.…”

mentioning

confidence: 99%

A Review of Current Research on Powder Mixed Electric Discharge Machining

Deepthi¹,

Tjprc²

2019

IJMPERD

View full text Add to dashboard Cite

In Die Sink electric discharge machining, mostly the dielectric material is in the liquid state such as mineral oils, kerosene, transformer oil, electric discharge machining oils or synthetic oils. Inferior surface quality, higher tool wear ratio, lesser material removal rate and higher machining time are the main disadvantages of using these dielectric fluids in electric discharge machining. The use of powder mixed with dielectric fluid named as a powder mixed electric discharge machining (PMEDM) is dependable to overcome the above-mentioned disadvantages and electric discharge machining performance improvement,. The current paper presents a literature review on the usage and effects of powder mixed electric discharge machining in characteristics of electrical discharge machining.

show abstract

Electrical Discharge Machining of Ti6Al4V in Hydroxyapatite Powder Mixed Dielectric Liquid

Cited by 74 publications

References 26 publications

Ti6Al4V Surface Modification by Hydroxyapatite Powder Mixed Electrical Discharge Machining for Medical Applications

Ti6Al4V Surface Modification by Hydroxyapatite Powder Mixed Electrical Discharge Machining for Medical Applications

Synthesis of electrical discharge metal matrix composite coating through compacted semi-sintered electrode and its tribological studies

A Review of Current Research on Powder Mixed Electric Discharge Machining

Contact Info

Product

Resources

About