Analytical Modeling of Subsurface Damage in Laser-Assisted Machining of Metal Matrix Composites Based on the Reinforcement Fracture Probability

Laser-assisted machining is a hybrid process that can effectively improve the machining quality of metal matrix composites by heating the materials in the cutting area. Considering the softening of matrix material and the enhancement of reinforcement fracture toughness due to laser heating, an analytical model of subsurface damage in laser-assisted machining of metal matrix composites is established in this paper. The subsurface damage depth is solved by the distribution of reinforcement fracture probability and the critical damage probability. A series of laser-assisted machining experiments are carried out to verify the accuracy of the proposed model. The results show that laser-assisted machining can reduce subsurface damage. This study provides a basis for the machining of metal matrix composites with minimal damage.