| HMMC | hybrid metal matrix composite |
| AF | alumina fibers |
| AP | alumina particles |
| PCD | polycrystalline diamond |
| Pav | power of laser beam (W) |
| vl | speed of the laser head (mm/s) |
| Ra | arithmetic mean deviation from the mean line (μm) |
| Rz | highest profile height (μm) |
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