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Unlike the traditional crystalline metals, metallic glasses are lack of long-range order and have short-range order. Metallic glasses as amorphous alloys have excellent physical, chemical and mechanical properties, and have a broad application prospects in military, aerospace and sports equipment due to their unique microstructure. Cutting is an important shaping process for high efficient manufacturing of metallic glass components. Nanometric cutting simulation of Cu50Zr50 was carried out to investigate the effect of cutting speed and cutting depth on the cutting force by molecular dynamics simulation. The radial distribution functions and common neighbor analysis were calculated to analyze the microstructure of the chips and subsurface of the metallic glass workpiece. The results showed that there is no obvious change of microstructure during cutting process of Cu50Zr50 metallic glasses. The above simulation results were compared with those of nanometric cutting of single crystal copper with the same cutting parameters. It is found that, when nanometric cutting of Cu50Zr50 metallic glass, the average value and the fluctuation of cutting forces are larger than that of single crystal coppers. In addition, the normal cutting force was found to be substantially equal to the main cutting force during the cutting process of Cu50Zr50 metallic glasses. However, the normal force is smaller than the main cutting force during nanometric cutting process of the single crystal copper.

Effect of Machining Parameters on the Cutting Force and Microstructure in Nanometric Cutting of Cu50Zr50 Metallic Glass