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

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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

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 α'-Ti phase (coarsening, breakage, and further coarsening). Corrosion resistance decreases with higher strains due to deformed α'-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.

Original languageEnglish
Article number111919
Number of pages12
JournalCorrosion Science
Volume230
DOIs
Publication statusPublished - 15 Apr 2024

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