EXPERIMENTAL INVESTIGATION OF OPTIMAL ED MACHINING PARAMETERS FOR Ti-6Al-4V BIOMATERIAL

Bhui, Amandeep Singh; Singh, Gurpreet; Sidhu, Sarabjeet Singh; Bains, Preetkanwal Singh

doi:10.22190/fume180824033b

Cited by 47 publications

(13 citation statements)

References 18 publications

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“…However, the pulseon/off duration has not posed significant impact on material removal process while machining. In accord with the previous studies, 32 the MER varied directly by the discharge current, the increase of which made the electric spark stronger and provided high temperature in the concerned area, and resulted in enhancing the material removal. Furthermore, the electrode geometry has been found to affect the material removal in EDM.…”

Section: Statistical Analysis Resultssupporting

confidence: 88%

On the machinability and properties of Ti–6Al–4V biomaterial with n-HAp powder–mixed ED machining

Bains¹,

Bahraminasab

Sidhu³

et al. 2019

Proc Inst Mech Eng H

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Nano-hydroxyapatite powder was used in electric discharge machining to modify the surface of Ti–6Al–4V medical alloy. Herein, electric discharge machining was performed, with and without powder-mixed flushing for evaluation of the material erosion rate and surface roughness. In addition to dielectric type, several process parameters including current, pulse-on duration, pulse-off duration, and electrode hole diameter were considered. The experiments were planned by Taguchi design technique and conducted to analyze the material erosion rate and surface roughness. After machining, scanning electron microscope, energy-dispersive X-ray spectrometry, and X-ray diffraction techniques were used to evaluate the surfaces of the samples. Furthermore, wear and corrosion tests were also carried out on the Ti alloy with modified surfaces. The influential factors were identified based on analysis of variance results. Current and dielectric type were the significant factors, both for the material erosion rate and surface roughness. The scanning electron microscope images of Ti–6Al–4V samples highlighted that the process parameters exhibited a vital influence on the topology and microstructure of machined surface. Furthermore, energy-dispersive X-ray spectrometry and X-ray diffraction analyses confirmed the presence of hydroxyapatite on Ti alloy surface after machining. Moreover, the results of wear and corrosion tests revealed lower wear and corrosion rates of the surface-treated workpiece with nano-hydroxyapatite.

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Section: Statistical Analysis Resultssupporting

confidence: 88%

On the machinability and properties of Ti–6Al–4V biomaterial with n-HAp powder–mixed ED machining

Bains¹,

Bahraminasab

Sidhu³

et al. 2019

Proc Inst Mech Eng H

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“…This fuel cell was tested with three different cathode configurations [8]. As noted in [31], this roughness ε (FC) is not a real measurable physical characteristic of the surface of the used material for conduits (on the contrary for pipes ε (p) can be measured or at least estimated accurately [32][33][34][35][36][37]).…”

Section: Of 12mentioning

confidence: 99%

Air-Forced Flow in Proton Exchange Membrane Fuel Cells: Calculation of Fan-Induced Friction in Open-Cathode Conduits with Virtual Roughness

Brkić

Praks

2020

Processes

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Measurements of pressure drop during experiments with fan-induced air flow in the open-cathode proton exchange membrane fuel cells (PEMFCs) show that flow friction in its open-cathode side follows logarithmic law similar to Colebrook’s model for flow through pipes. The stable symbolic regression model for both laminar and turbulent flow presented in this article correlates air flow and pressure drop as a function of the variable flow friction factor which further depends on the Reynolds number and the virtual roughness. To follow the measured data, virtual inner roughness related to the mesh of conduits of fuel cell used in the mentioned experiment is 0.03086, whereas for pipes, real physical roughness of their inner pipe surface goes practically from 0 to 0.05. Numerical experiments indicate that the novel approximation of the Wright-ω function reduced the computational time from half of a minute to fragments of a second. The relative error of the estimated friction flow factor is less than 0.5%.

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“…Optimal ED machining parameters were investigated by Bhui et al [16] for the surface modification of Ti6Al4V with graphite tool. Deposition of bioactive layer and formation of intermetallic compounds were examined using SEM and XRD respectively.…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology and Microhardness Behavior of 316l in Hap-Pmedm

Singh¹,

Lamichhane

Bhui

et al. 2019

FU Mech Eng

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The development of biomaterials for implants nowadays requires materials with superior mechanical and physical properties for enhanced osseointegration and sustained longevity. This research work was conducted to investigate the influence of nano hydroxyapatite (HAp) powder mixed electrical discharge machining (PMEDM) on surface morphology and microhardness of modified 316L stainless steel surface. The chosen process parameters were discharge current, pulse on/off duration and gap voltage in order to analyze the selected output responses. HAp concentration (15 g/l) along with reverse polarity was kept constant for current experimentation. The experimental results testified that surface morphology of PMEDM surface was significantly improved along with augmentation of 79% in microhardness (HV) of HAp modified surface of medical grade stainless steel. Furthermore, XRD and SEM characterization confirmed the deposition of calcium, phosphorous and inter-metallic compounds on HA-PMEDMed surface. The surface thus produced is expected to facilitate better bone-implant adhesion and bioactivity.

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EXPERIMENTAL INVESTIGATION OF OPTIMAL ED MACHINING PARAMETERS FOR Ti-6Al-4V BIOMATERIAL

Cited by 47 publications

References 18 publications

On the machinability and properties of Ti–6Al–4V biomaterial with n-HAp powder–mixed ED machining

On the machinability and properties of Ti–6Al–4V biomaterial with n-HAp powder–mixed ED machining

Air-Forced Flow in Proton Exchange Membrane Fuel Cells: Calculation of Fan-Induced Friction in Open-Cathode Conduits with Virtual Roughness

Surface Morphology and Microhardness Behavior of 316l in Hap-Pmedm

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