Effects of Nd:YAG Laser Surface Treatment on Tribological Properties of Cold-Sprayed Ti-6Al-4V Coatings Tested against 100Cr6 Steel under Dry Condition. Issue 3 (4th May 2019)

• Record Type: Journal Article
• Authors: Khun, N. W.; Tan, A. W. Y.; Sun, W.; Liu, E.
• Is Part Of: Tribology transactions. Volume 62:Issue 3(2019)
• Page Start: 391
• Page End: 402
• Publication Date: 2019-05-04
• Subjects: Cold spray -- laser surface melting -- laser power -- Ti-6Al-4V -- hardness -- wear; Tribology -- Periodicals; 621
• DOI: 10.1080/10402004.2018.1563258
• Languages: English
• ISSNs: 1040-2004

Abstract

Abstract: The surfaces of cold-sprayed Ti-6Al-4V (Ti64) coatings were laser irradiated with different laser powers of 50–200 W to study the effects of Nd:YAG laser surface treatment on their tribological properties. The hardness of the laser-treated Ti64 coatings became higher with higher laser power due to the more rapid cooling caused by a larger temperature difference between the coating temperature and room temperature. The wear of the laser-treated Ti64 coatings tested against 6-mm 100Cr6 steel balls under dry condition at room temperature decreased with increased laser power as a result of their increased surface wear resistance associated with their increased surface hardness. It could be concluded that the laser surface treatment of the cold-sprayed Ti64 coatings improved their surface wear resistance compared to that of the untreated Ti64 coatings.