Author Identifier (ORCID)
Abstract
As medical titanium alloys inevitably undergo synergistic actions of stress and corrosion in human body, a comprehensive investigation of their relevant properties is deemed essential for ensuring their safe application. This work investigates the uniaxial tensile stress electrochemical behaviour of Ti-6Al-4V alloy fabricated by electron beam powder bed fusion under simulated implantation conditions. The results indicate that tensile stress facilitates rapid formation of a dense passive film, which contains a high proportion of high-valent oxides. As the passivation process proceeds, applied stress promotes more defects accumulation in the passive film, compromising its barrier function and reducing corrosion resistance. Under sustained uniaxial tensile stress, the protective capacity of passive film gradually declines as time and tensile strain increase. Furthermore, compared to the samples parallel to the construction direction, the samples perpendicular to the construction direction exhibit higher surface grain boundaries and dislocation densities, thus demonstrating inferior corrosion resistance under stress conditions. These findings provide significant scientific insight for the material selection, reliability, and durability assessment of medical Ti-6Al-4V implants.
Keywords
corrosion resistance, electron beam powder bed fusion, passive film, Ti-6Al-4V, uniaxial tensile stress
Document Type
Journal Article
Date of Publication
11-1-2026
Article Number
114154
ISSN
0010938X
Volume
272
Publication Title
Corrosion Science
Publisher
Elsevier
School
Centre for Advanced Materials and Manufacturing / School of Engineering
Funding Information
This work was supported by the Advanced Materials-National Science and Technology Major Project (2025ZD0612001), the National Natural Science Foundation of China (52321001, U2241245), the Strategic Priority Research Program of CAS (XDB1420000) and ECU DVC strategic research support fund (23965).
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
Recommended Citation
Zheng, H., Yan, M., Bai, Y., Wang, Q., Zhang, L., Xu, J., Wang, H., Ma, Y., Li, S., & Yang, R. (2026). Electrochemical behavior of passive film on electron beam powder bed fusion fabricated Ti-6Al-4V alloy under uniaxial tensile stress. Corrosion Science, 272, Article 114154. https://doi.org/10.1016/j.corsci.2026.114154