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Article

The Effect of a Duplex Surface Treatment on the Corrosion and Tribocorrosion Characteristics of Additively Manufactured Ti-6Al-4V

1
Department of Metallurgy and Materials Engineering, University of Malta, MSD 2080 Msida, Malta
2
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Materials 2023, 16(5), 2098; https://doi.org/10.3390/ma16052098
Submission received: 7 February 2023 / Revised: 18 February 2023 / Accepted: 25 February 2023 / Published: 4 March 2023
(This article belongs to the Special Issue Design and Post Processing for Metal Additive Manufacturing)

Abstract

The use of additively manufactured components specifically utilizing titanium alloys has seen rapid growth particularly in aerospace applications; however, the propensity for retained porosity, high(er) roughness finish, and detrimental tensile surface residual stresses are still a limiting factor curbing its expansion to other sectors such as maritime. The main aim of this investigation is to determine the effect of a duplex treatment, consisting of shot peening (SP) and a coating deposited by physical vapor deposition (PVD), to mitigate these issues and improve the surface characteristics of this material. In this study, the additive manufactured Ti-6Al-4V material was observed to have a tensile and yield strength comparable to its wrought counterpart. It also exhibited good impact performance undergoing mixed mode fracture. It was also observed that the SP and duplex treatments resulted in a 13% and 210% increase in hardness, respectively. Whilst the untreated and SP treated samples exhibited a similar tribocorrosion behavior, the duplex-treated sample exhibited the greatest resistance to corrosion-wear observed by the lack of damage on the surface and the diminished material loss rates. On the other hand, the surface treatments did not improve the corrosion performance of the Ti-6Al-4V substrate.
Keywords: surface engineering; selective laser melting; tribocorrosion; corrosion; Ti6Al4V surface engineering; selective laser melting; tribocorrosion; corrosion; Ti6Al4V

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MDPI and ACS Style

Vella, K.A.; Buhagiar, J.; Cassar, G.; Pizzuto, M.M.; Bonnici, L.; Chen, J.; Zhang, X.; Huang, Z.; Zammit, A. The Effect of a Duplex Surface Treatment on the Corrosion and Tribocorrosion Characteristics of Additively Manufactured Ti-6Al-4V. Materials 2023, 16, 2098. https://doi.org/10.3390/ma16052098

AMA Style

Vella KA, Buhagiar J, Cassar G, Pizzuto MM, Bonnici L, Chen J, Zhang X, Huang Z, Zammit A. The Effect of a Duplex Surface Treatment on the Corrosion and Tribocorrosion Characteristics of Additively Manufactured Ti-6Al-4V. Materials. 2023; 16(5):2098. https://doi.org/10.3390/ma16052098

Chicago/Turabian Style

Vella, Kelsey Ann, Joseph Buhagiar, Glenn Cassar, Martina Marie Pizzuto, Luana Bonnici, Jian Chen, Xiyu Zhang, Zhiquan Huang, and Ann Zammit. 2023. "The Effect of a Duplex Surface Treatment on the Corrosion and Tribocorrosion Characteristics of Additively Manufactured Ti-6Al-4V" Materials 16, no. 5: 2098. https://doi.org/10.3390/ma16052098

APA Style

Vella, K. A., Buhagiar, J., Cassar, G., Pizzuto, M. M., Bonnici, L., Chen, J., Zhang, X., Huang, Z., & Zammit, A. (2023). The Effect of a Duplex Surface Treatment on the Corrosion and Tribocorrosion Characteristics of Additively Manufactured Ti-6Al-4V. Materials, 16(5), 2098. https://doi.org/10.3390/ma16052098

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