This study explores the effect of surface re-finishing on the corrosion behavior of electron beam manufactured (EBM) Ti-G5 (Ti-6Al-4V), including the novel application of an electron beam surface remelting (EBSR) technique. Specifically, the relationship between material surface roughness and corrosion resistance was examined. Surface roughness was tested in the as-printed (AP), mechanically polished (MP), and EBSR states and compared to wrought (WR) counterparts. Electrochemical measurements were performed in chloride-containing media. It was observed that surface roughness, rather than differences in the underlying microstructure, played a more significant role in the general corrosion resistance in the environment explored here. While both MP and EBSR methods reduced surface roughness and enhanced corrosion resistance, mechanical polishing has many known limitations. The EBSR process explored herein demonstrated positive preliminary results. The surface roughness (Ra) of the EBM-AP material was considerably reduced by 82%. Additionally, the measured corrosion current density in 0.6 M NaCl for the EBSR sample is 0.05 µA cm–2, five times less than the value obtained for the EBM-AP specimen (0.26 µA cm–2).
@article{osti_1877147,
author = {Shahsavari, Mohammadali and Imani, Amin and Setavoraphan, Andaman and Schaller, Rebecca Filardo and Asselin, Edouard},
title = {Electron beam surface remelting enhanced corrosion resistance of additively manufactured Ti-6Al-4V as a potential in-situ re-finishing technique},
annote = {This study explores the effect of surface re-finishing on the corrosion behavior of electron beam manufactured (EBM) Ti-G5 (Ti-6Al-4V), including the novel application of an electron beam surface remelting (EBSR) technique. Specifically, the relationship between material surface roughness and corrosion resistance was examined. Surface roughness was tested in the as-printed (AP), mechanically polished (MP), and EBSR states and compared to wrought (WR) counterparts. Electrochemical measurements were performed in chloride-containing media. It was observed that surface roughness, rather than differences in the underlying microstructure, played a more significant role in the general corrosion resistance in the environment explored here. While both MP and EBSR methods reduced surface roughness and enhanced corrosion resistance, mechanical polishing has many known limitations. The EBSR process explored herein demonstrated positive preliminary results. The surface roughness (Ra) of the EBM-AP material was considerably reduced by 82%. Additionally, the measured corrosion current density in 0.6 M NaCl for the EBSR sample is 0.05 µA cm–2, five times less than the value obtained for the EBM-AP specimen (0.26 µA cm–2).},
doi = {10.1038/s41598-022-14907-2},
url = {https://www.osti.gov/biblio/1877147},
journal = {Scientific Reports},
issn = {ISSN 2045-2322},
number = {1},
volume = {12},
place = {United States},
publisher = {Nature Publishing Group},
year = {2022},
month = {07}}
Dolimont, Adrien; Demarbaix, Anthonin; Ducobu, François
PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019, AIP Conference Proceedingshttps://doi.org/10.1063/1.5112696
Journal Article
·
Sun Jan 19 23:00:00 EST 2020
· Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
·OSTI ID:1761732