Effects of working gas on wear and corrosion resistances of cold sprayed Ti-6Al-4V coatings
Effects of working gas on wear and corrosion resistances of cold sprayed Ti-6Al-4V coatings
In this study, the wear and corrosion resistances of cold sprayed Ti-6Al-4V (Ti64) coatings on commercial Ti64 substrates using nitrogen (N2) and helium (He) working gases were systematically investigated. The denser microstructure of the Ti64 coating with a lower porosity level was achieved with He working gas. Therefore, the Ti64 coating deposited with He working gas had the higher hardness than the one deposited with N2 working gas. The Ti64 coating deposited with He working gas had higher adhesion strength than the one deposited with N2 working gas. The tribological results showed that the use of He working gas during the cold spraying gave rise to the higher abrasive wear resistance of the Ti64 coating via its higher hardness. In addition, the Ti64 coating deposited with He working gas did not show any fatigue micro-cracks on its wear track during the prolonged sliding probably due to the relatively strong bonding between sprayed Ti64 particles. It was found that the Ti64 coating deposited with He working gas had lower anodic dissolution in 0.6 M NaCl solution compared to the one deposited with N2 working gas as a result of its lower porosity level.
Cold spray, Corrosion, Ti-6Al-4V coating, Wear, Working gas
1-12
Khun, N. W.
5218a552-1378-4f19-8aa9-eee5b38d939f
Tan, A. W.Y.
3d644676-a520-4f41-b7f1-410d1c46689d
Bi, K. J.W.
c3ac1da7-7a80-4448-a768-36cdec745c0b
Liu, E.
63b60e12-5d42-4f66-ba55-24da69557b35
25 September 2016
Khun, N. W.
5218a552-1378-4f19-8aa9-eee5b38d939f
Tan, A. W.Y.
3d644676-a520-4f41-b7f1-410d1c46689d
Bi, K. J.W.
c3ac1da7-7a80-4448-a768-36cdec745c0b
Liu, E.
63b60e12-5d42-4f66-ba55-24da69557b35
Khun, N. W., Tan, A. W.Y., Bi, K. J.W. and Liu, E.
(2016)
Effects of working gas on wear and corrosion resistances of cold sprayed Ti-6Al-4V coatings.
Surface and Coatings Technology, 302, .
(doi:10.1016/j.surfcoat.2016.05.052).
Abstract
In this study, the wear and corrosion resistances of cold sprayed Ti-6Al-4V (Ti64) coatings on commercial Ti64 substrates using nitrogen (N2) and helium (He) working gases were systematically investigated. The denser microstructure of the Ti64 coating with a lower porosity level was achieved with He working gas. Therefore, the Ti64 coating deposited with He working gas had the higher hardness than the one deposited with N2 working gas. The Ti64 coating deposited with He working gas had higher adhesion strength than the one deposited with N2 working gas. The tribological results showed that the use of He working gas during the cold spraying gave rise to the higher abrasive wear resistance of the Ti64 coating via its higher hardness. In addition, the Ti64 coating deposited with He working gas did not show any fatigue micro-cracks on its wear track during the prolonged sliding probably due to the relatively strong bonding between sprayed Ti64 particles. It was found that the Ti64 coating deposited with He working gas had lower anodic dissolution in 0.6 M NaCl solution compared to the one deposited with N2 working gas as a result of its lower porosity level.
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Accepted/In Press date: 19 May 2016
Published date: 25 September 2016
Additional Information:
Funding Information:
Authors are grateful for the financial support from the National Research Foundation (NRF), Rolls-Royce (RR), and Nanyang Technological University (NTU), Singapore, with the NRF-RR-NTU research grant number of M-RT3.1 , and the project team members from RR, Singapore, Harry Eyre, Anna Tai and Nicholas Weeks for their contributions to this work.
Publisher Copyright:
© 2016 Elsevier B.V.
Keywords:
Cold spray, Corrosion, Ti-6Al-4V coating, Wear, Working gas
Identifiers
Local EPrints ID: 475766
URI: http://eprints.soton.ac.uk/id/eprint/475766
ISSN: 0257-8972
PURE UUID: 26fb1d93-07df-4b1b-8318-d43546d5ef4d
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Date deposited: 28 Mar 2023 16:31
Last modified: 17 Mar 2024 13:14
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Contributors
Author:
N. W. Khun
Author:
A. W.Y. Tan
Author:
K. J.W. Bi
Author:
E. Liu
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