1：Experimental Design and Method Selection:

The study involved laser surface treatment of cold sprayed Ti-6Al-4V coatings using a Nd:YAG laser with varying powers to investigate changes in surface properties and tribological behavior. Theoretical models for laser-material interaction and wear mechanisms were considered.

2：Sample Selection and Data Sources:

Commercial Ti-6Al-4V substrates were used, coated with Ti-6Al-4V powder via cold spray process. Samples were prepared by wire cutting and polishing.

3：List of Experimental Equipment and Materials:

High pressure cold spray system, Nd:YAG laser, surface profilometer, scanning electron microscope, Vickers micro-hardness tester, ball-on-disk tribometer, optical microscope, ImageJ software, ethanol for cleaning, Ti-6Al-4V powder (size: 1-45 μm), 100Cr6 steel balls (6 mm diameter).

4：Experimental Procedures and Operational Workflow:

Coatings were deposited, laser treated with powers 50-200 W, characterized for surface topography, hardness, and tested for friction and wear against steel balls under dry conditions at room temperature. Cleaning steps with ethanol in ultrasonic bath were included.

5：Data Analysis Methods:

Surface roughness measured with profilometry, hardness with Vickers test, wear rates calculated from wear track dimensions, friction coefficients recorded, and microstructural analysis using SEM and OM. Statistical averaging from multiple measurements.