研究目的
Investigating the effect of different texturing dimple patterns on the tribological behavior and microstructural changes of a laser CoCr alloy.
研究成果
The laser surface texturing treatment enhanced the hardness and elastic modulus for laser textured surface due secondary phases refinement. Wear resistance is increased five times approximately by the dimple patterns effect reducing the contact area and minimizing the third body abrasion wear by the wear debris reservoir action of the dimples. The friction coefficient in the dimple pin pattern is 2 times lower compared with a non-textured treated CoCr.
研究不足
The study focuses on the effect of laser texturing on CoCr alloy's wear resistance and tribological performance under specific conditions. The comparison with different dimple patterns and its effect on the wear marks and wear resistance has not been extensively studied for the CoCr alloys.
1：Experimental Design and Method Selection:
A 23 factorial experimental design (DOE) was developed for selecting the peak power, speed and spot diameter of the laser texturing processes for dimple generation on the texturing patterns.
2：Sample Selection and Data Sources:
Four rectangular samples with a repetition of CoCr alloy were cut with 20 mm length, 10 mm width and 5mm of thickness.
3：List of Experimental Equipment and Materials:
HTS ORLASER 160 W equipment with Nd: YAG laser, SEM with EDS, XRD, nanoindentation tests, pin-on-disc tribometer.
4：Experimental Procedures and Operational Workflow:
Samples were prepared using metallographic techniques, laser texturing processes were performed with different arrays, and wear tests were performed under lubricated sliding condition.
5：Data Analysis Methods:
Microstructural analysis was characterized using SEM with EDS, XRD, and nanoindentation tests. The influence of the different parameters in the tribological performance was evaluated.
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