Skip to main content

Study on the Surface Modification of Nanostructured Ti Alloys and Coarse-Grained Ti Alloys.

Lin, H.-K., Cheng, Y.-H., Li, G.-Y., Chen, Y.-C., Bazarnik, P., Muzy, J., Huang, Y. and Langdon, T. G, 2022. Study on the Surface Modification of Nanostructured Ti Alloys and Coarse-Grained Ti Alloys. Metals, 12 (6), 948.

Full text available as:

metals-12-00948.pdf - Published Version
Available under License Creative Commons Attribution.


DOI: 10.3390/met12060948


Commercial purity titanium (CP-Ti) and a Ti-6Al-4V alloy (Ti64) were processed by high-pressure torsion (HPT) for 10 and 20 turns. The HPT processing produced a nanostructured microstructure and a significant strength enhancement in the CP-Ti and Ti64 samples. After 20 turns, the samples of HPT-processed CP-Ti and Ti64 were subjected to laser surface treatments in an air atmosphere using different scanning speeds and laser powers. The surface roughness of the laser-modified samples increased with increasing laser power and this produced hydrophilicity due to a lower contact angle. After a holding time of 27 days, these samples underwent a hydro-philic-to-hydrophobic transformation as the contact angle increased from 13° to as much as 120° for the CP-Ti sample, and for the Ti64 sample the contact angle increased from 10° to 126°. In addition, the laser surface modification process was carried out with different atmospheres (air, vacuum and O2) on heat-treated but unstrained CP-Ti and Ti64 samples and the contact angle changed due to the surface element content. Thus, as the carbon content increased from 28% to 47% in CP-Ti in a vacuum environment, the surface contact angle increased from 22° to 140°. When a laser surface modification process is conducted under oxygen-less conditions, it is concluded that the contact angle increases rapidly in order to control the hydrophobic properties of Ti and the Ti alloy.

Item Type:Article
Additional Information:This article belongs to the Special Issue Advanced Ti-Based Alloys
Uncontrolled Keywords:CP-Ti; high-pressure torsion; hydrophobic; laser surface modification; Ti-6Al-4V
Group:Faculty of Science & Technology
ID Code:37009
Deposited By: Symplectic RT2
Deposited On:31 May 2022 11:52
Last Modified:31 May 2022 11:52


Downloads per month over past year

More statistics for this item...
Repository Staff Only -