On the machinability and properties of Ti–6Al–4V biomaterial with n-HAp powder–mixed ED machining
| Autor: | Marjan Bahraminasab, Preetkanwal Singh Bains, Gurpreet Singh, Sarabjeet Singh Sidhu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Titanium
Materials science Scanning electron microscope Mechanical Engineering Machinability Biocompatible Materials 02 engineering and technology General Medicine Prosthesis Design 021001 nanoscience & nanotechnology Microstructure Nanostructures Corrosion Taguchi methods Durapatite 020303 mechanical engineering & transports Electrical discharge machining 0203 mechanical engineering Machining Alloys Electrochemistry Surface roughness Composite material 0210 nano-technology Electrodes |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 234:232-242 |
| ISSN: | 2041-3033 0954-4119 |
| DOI: | 10.1177/0954411919891887 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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