Surface characteristics of Ti-6Al-4V by SiC abrasive-mixed EDM with magnetic stirring

Li, L.; Zhao, Lingling; Li, Z. Y.; Liu, Feng; Bai, Xue

doi:10.1080/10426914.2016.1151043

Cited by 87 publications

(30 citation statements)

References 17 publications

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“…Some of the advances are done recently in the EDM process in which assistive technologies and concepts are used. These include EDM with powder and/or surfactant mixed dielectric [13], ultrasonic-assisted machining [14], EDM fast hole drilling [15], magnetic stirring [16] and rotary machining etc. The mixing of powder, surfactant and different type of gasses in the dielectric to enhance properties of dielectric or to deposit a specific required layer on the surface in EDM is called additive mixed electric discharge machining.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…It was seen that 25 g/l concentration of titanium carbide (TaC) powder in dielectric medium of EDM enhanced the surface characteristics and micro-hardness value of 1200 HV was achievable. There was an improvement in the EDM performance on machining of Ti-6Al-4V by dispersing SiC particles (abrasives) in the dielectric medium with magnetic stirring mechanism [5].Other researchers successfully achieved improved hardness of the specimen surface due to the formation of TiC and TiSi 2 . A Cu-Mn tool made with powder metallurgy was used for machining die steel with the EDM process utilizing the Taguchi technique [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

Sundriyal

Vipin

Walia

2020

SV-JME

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The Powder-Mixed Near-Dry Electric Discharge Machining (PMND-EDM) methodology has proven to be efficient in terms of machining rate, surface morphology, and environmental friendliness, unlike traditional EDM. In this study, the presence of a conductive metallic powder (zinc) in the dielectric medium was responsible for changing the topography of the workpiece (EN-31) and resulted in a higher micro-hardness value of the machined component. In this research, an approach has been made to optimize the significant process parameters by using a Taguchi L9 orthogonal array (OA) to obtain machined components with higher values of micro-hardness, which was measured in terms of Vickers hardness HV. The selected process parameters were tool diameter, mist flow rate, metallic powder concentration, and dielectric mist pressure. By introducing foreign particles (metallic powder), the topography of the machined products has been improved, and the micro-hardness value was found to be enhanced. The confirmation experiment was performed for optimal process parameter settings, and the enhanced microhardness value was found to be 506.63 HV in the machined EN-31 die steel.

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“…In addition, the hardness and wear resistance of the workpiece-electrode material were greatly enhanced. Li et al [167] observed the Ti-6Al-4V EDMed surface behavior by mixing silicon carbide abrasives with dielectric fluid. The results revealed the formation of carbide film, which is characterized by more than twofold rise in hardness and greatly improves wear resistance.…”

Section: Hard and Nanoporous Carbide Layer Formationmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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Surface treatment remained a key solution to numerous problems of synthetic hard tissues. The basic methods of implant surface modification include various physical and chemical deposition techniques. However, most of these techniques have several drawbacks such as excessive cost and surface cracks and require very high sintering temperature. Additive mixed-electric discharge machining (AM-EDM) is an emerging technology which simultaneously acts as a machining and surface modification technique. Aside from the mere molds, dies, and tool fabrication, AM-EDM is materializing to finishing of automobiles and aerospace, nuclear, and biomedical components, through the concept of material migrations. The mechanism of material transfer by AM-EDM resembles electrophoretic deposition, whereby the additives in the AM-EDM dielectric fluids are melted and migrate to the machined surface, forming a mirror-like finishing characterized by extremely hard, nanostructured, and nanoporous layers. These layers promote the bone in-growth and strengthen the cell adhesion. Implant shaping and surface treatment through AM-EDM are becoming a key research focus in recent years. This paper reports and summarizes the current advancement of AM-EDM as a potential tool for orthopedic and dental implant fabrication. Towards the end of this paper, the current challenges and future research trends are highlighted.

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Surface characteristics of Ti-6Al-4V by SiC abrasive-mixed EDM with magnetic stirring

Cited by 87 publications

References 17 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

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

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