Effects of Nd : YAG laser surface treatment on tribological properties of cold-sprayed Ti-6Al-4V coatings tested against 100Cr6 steel under dry condition

• Main Authors: Khun, Nay Win, Tan, Adrian Wei Yi, Sun, Wen, Liu, Erjia
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Mechanical engineering; Cold Spray; Laser Surface Melting
• Online Access: https://hdl.handle.net/10356/145291
• Institution: Nanyang Technological University

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.