Mechanical and tribological properties of cold-sprayed Ti coatings on Ti-6Al-4V substrates
Mechanical and tribological properties of cold-sprayed Ti coatings on Ti-6Al-4V substrates
A cold spray process was used to deposit titanium (Ti) coatings of different thicknesses on commercial Ti-6Al-4V (Ti64) substrates. The hardness of the Ti coatings was measured using a Vickers micro-indenter. It was found that the thicker Ti coatings had higher hardness probably due to the better uniformity and higher density of the coatings. The tribological results showed that the friction and wear of the Ti coatings tested against a steel ball under dry condition became lower with higher thickness probably due to the higher wear resistance of the thicker coatings associated with their higher hardness. The specific wear rates of all the Ti coatings were significantly lower than that of the Ti64 substrate as a result of the higher wear resistance of the Ti coatings associated with their cold-worked microstructures and the formation of high wear resistant oxide layers on their wear tracks during the wear testing.
cold spray, friction, hardness, microstructure, thickness, Ti coating, wear
715-724
Khun, N. W.
5218a552-1378-4f19-8aa9-eee5b38d939f
Tan, A. W.Y.
3d644676-a520-4f41-b7f1-410d1c46689d
Liu, E.
f0eb8f01-7079-4d8a-9687-f00250b31ffd
1 April 2016
Khun, N. W.
5218a552-1378-4f19-8aa9-eee5b38d939f
Tan, A. W.Y.
3d644676-a520-4f41-b7f1-410d1c46689d
Liu, E.
f0eb8f01-7079-4d8a-9687-f00250b31ffd
Khun, N. W., Tan, A. W.Y. and Liu, E.
(2016)
Mechanical and tribological properties of cold-sprayed Ti coatings on Ti-6Al-4V substrates.
Journal of Thermal Spray Technology, 25 (4), .
(doi:10.1007/s11666-016-0396-6).
Abstract
A cold spray process was used to deposit titanium (Ti) coatings of different thicknesses on commercial Ti-6Al-4V (Ti64) substrates. The hardness of the Ti coatings was measured using a Vickers micro-indenter. It was found that the thicker Ti coatings had higher hardness probably due to the better uniformity and higher density of the coatings. The tribological results showed that the friction and wear of the Ti coatings tested against a steel ball under dry condition became lower with higher thickness probably due to the higher wear resistance of the thicker coatings associated with their higher hardness. The specific wear rates of all the Ti coatings were significantly lower than that of the Ti64 substrate as a result of the higher wear resistance of the Ti coatings associated with their cold-worked microstructures and the formation of high wear resistant oxide layers on their wear tracks during the wear testing.
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Accepted/In Press date: 1 February 2016
Published date: 1 April 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 in this work.
Publisher Copyright:
© 2016, ASM International.
Keywords:
cold spray, friction, hardness, microstructure, thickness, Ti coating, wear
Identifiers
Local EPrints ID: 475754
URI: http://eprints.soton.ac.uk/id/eprint/475754
ISSN: 1059-9630
PURE UUID: 8ba664c7-6e8b-44bd-b036-42952b8a08be
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Date deposited: 27 Mar 2023 16:48
Last modified: 17 Mar 2024 13:14
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Author:
N. W. Khun
Author:
A. W.Y. Tan
Author:
E. Liu
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