Corrosion and passivation behavior of laser powder bed fusion produced Ti-6Al-4V under various prior plastic deformation strains

Authors

P. Qin, Edith Cowan UniversityFollow
L. Y. Chen
Y. J. Liu
S. X. Liang
H. Sun
L. C. Zhang, Edith Cowan UniversityFollow

Document Type

Journal Article

Publication Title

Corrosion Science

Volume

230

Publisher

Elsevier

School

School of Engineering / Centre for Advanced Materials and Manufacturing

Funders

Industrial grant / Jiangsu Province six talent peaks project / Edith Cowan University

Comments

Qin, P., Chen, L. Y., Liu, Y. J., Liang, S. X., Sun, H., & Zhang. L. C. (2024). Corrosion and passivation behavior of laser powder bed fusion produced Ti-6Al-4V under various prior plastic deformation strains. Corrosion Science, 230, article 111919. https://doi.org/10.1016/j.corsci.2024.111919

Abstract

This work investigated the corrosion behavior of LPBF-produced Ti-6Al-4V under varying compression strains in a 3.5 wt% NaCl solution. It identifies that increasing compression strain causes significant alterations in the acicular a'-Ti phase (coarsening, breakage, and further coarsening). Corrosion resistance decreases with higher strains due to deformed a'-Ti phases, leading to increased film growth kinetics (from 0.09× 10−10 cm2/s increase to 12.75 × 10−10 cm2/s). Samples under higher strains (e.g., 32%) exhibit fluctuations in corrosion behavior due to initiated cracks and subsequent crevice corrosion. These findings are vital for understanding LPBF-produced Ti-6Al-4V in applications requiring mechanical strength and corrosion resilience.

DOI

10.1016/j.corsci.2024.111919

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.