Characterization and Corrosion Behaviour Study on Biocompatible Ti-6Al-4V Component Fabricated by Electron Beam Melting

Ti-6Al-4V biocompatible material to be used as an implant, fabricated by Electron Beam Melting, was investigated for mechanical properties viz. hardness, grain size and porosity. Phase characterization was analysed by X-ray diffraction; morphological and micro structural features were assessed by Scanning Electron Microscopy and Optical Microscope respectively. The as-produced Electron beam melted Ti-6Al-4V sample had increased surface roughness and a thick surface oxide layer. The corrosion behaviour in simulated body fluid environment was compared for wrought and Electron beam melted Ti-6Al-4V samples by performing anodic polarization measurement using sequencer computer controlled potentiostat. The Electron beam melted sample had the corrosion rate of 0.0148 mils per year and wrought sample had 0.0196 mils per year.

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Structural Features of the Alloyed Layers Formed by Electron Beam Melting in Air

Materials Today Proceedings ◽

10.1016/j.matpr.2018.12.161 ◽

2019 ◽

Vol 11 ◽

pp. 375-379

Author(s):

Lyubov Chuchkova ◽

Elena Lozhkina ◽

Aleksandr Belov

Keyword(s):

Electron Beam ◽

Electron Beam Melting ◽

Structural Features

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Corrosion behaviour of CoCrMo alloy fabricated by electron beam melting

Corrosion Science ◽

10.1016/j.corsci.2018.04.033 ◽

2018 ◽

Vol 139 ◽

pp. 68-75 ◽

Cited By ~ 23

Author(s):

Xiaojuan Gong ◽

Yunping Li ◽

Yan Nie ◽

Zaiwang Huang ◽

Feng Liu ◽

...

Keyword(s):

Electron Beam ◽

Electron Beam Melting ◽

Corrosion Behaviour ◽

Cocrmo Alloy

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Effect of the Beam Current during the Electron-Beam Melting of Titanium Alloy Ti–6Al–4V on the Structural Features and Phase Transitions in Gas-Phase Hydrogenation

Journal of Surface Investigation X-ray Synchrotron and Neutron Techniques ◽

10.1134/s1027451019030170 ◽

2019 ◽

Vol 13 (3) ◽

pp. 429-433

Author(s):

N. S. Pushilina ◽

V. N. Kudiiarov ◽

M. S. Syrtanov ◽

E. B. Kashkarov

Keyword(s):

Titanium Alloy ◽

Electron Beam ◽

Phase Transitions ◽

Gas Phase ◽

Electron Beam Melting ◽

Beam Current ◽

Structural Features

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Microstructures of Electron Beam Melted (EBM) Biomaterial Ti-6Al-4V

MRS Proceedings ◽

10.1557/proc-1132-z09-06 ◽

2008 ◽

Vol 1132 ◽

Cited By ~ 1

Author(s):

Adnan Safdar ◽

Liu-Ying Wei

Keyword(s):

Electron Beam ◽

Electron Beam Melting ◽

Layer Structure ◽

Processing Parameters ◽

Optical Microscope ◽

Solid Samples ◽

Direction Parallel ◽

Β Phase ◽

Shape Structure ◽

Columnar Grains

ABSTRACTTi-6Al-4V alloy is an attractive biomaterial. The current work evaluates the microstructures of the solid and net-shape Ti-6Al-4V alloy produced by Electron Beam Melting (EBM) system using SEM/EDX and optical microscope. The microstructures are influenced by the cooling rate, processing parameters of the EBM system and re-heating of the existing layer during the melting of subsequent layers. Layer structure and columnar grains have been observed, with growing direction parallel to the built direction. The interior of these grains consists of alternating α / β phases. The β phase in the colonies resembles rod shape embedded in the α platelet. Along the grain boundaries more or less continuous α layers were observed. In comparison to solid samples uneven surfaces and pores were seen in the net shape structure. Microhardness evaluation of the EBM produced alloys was also carried out and compared with conventionally produced alloys.

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Role of Aluminium on the Microstructure and Corrosion Behaviour of Magnesium Prepared by Powder Metallurgy Method

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.3.2020.14.0618 ◽

2020 ◽

Vol 17 (3) ◽

pp. 8206-8213

Author(s):

J. Alias

Keyword(s):

Corrosion Resistance ◽

Powder Metallurgy ◽

Corrosion Behaviour ◽

Corrosion Current ◽

Optical Microscope ◽

High Reactivity ◽

Aluminium Content ◽

Powder Metallurgy Method ◽

X Ray Diffraction ◽

Promising Development

Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys.

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