Influence mechanism of ultrasonic vibration and pulsed laser on the surface formation of SiCp/Al in cutting

The challenge of precisely controlling both macroscopic and microscopic damages to the Al matrix and two-phase interface significantly impedes the large-scale utilization of SiCp/Al composites in aerospace and other domains. Pulsed laser ultrasonic vibration assisted cutting (PLUVAC) emerges as a highly promising approach. In comparison to conventional turning processes, PLUVAC reduces the surface roughness to 0.305 μm. Moreover, the depth of subsurface damage is decreased by 49.2 %. However, the heat transfer process of pulsed laser and the microscopic action mechanism of the pulsed laser and ultrasonic to the workpiece surface and subsurface is unclear. Therefore, this paper uses micro and nano scale simulation methods. The temperature field and grain deformation process of PLUVAC were studied. It was found that PLUVAC inhibits work hardening and interface damage by promoting dynamic recovery. The formed subgrains are finer and more prone to recrystallization. Therefore, the crystal structure of PLUVAC tends to be more complete. This study provides a unique perspective for revealing the deep mechanism of PLUVAC improving the surface quality of ceramic particle reinforced metal matrix composites.