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采用基于分子动力学的仿真方法建立了金属钛纳米切削分子动力学模型,选择了有代表性的切削条件,通过仿真得到瞬间原子位置图像并对切削过程中材料去除现象、加工表面形成过程、系统势能和工件温度等的变化进行了分析。发现在金属钛的纳米切削过程中切屑和加工表面是由于晶格能的释放和位错的不断延伸扩展形成的。已加工表面原子的弹性恢复和晶格重构能够减缓总势能和温度不断增加的趋势,并使其伴随有微小波动。
Based on the molecular dynamics simulation method, the molecular dynamics model of titanium metal cutting was established. The representative cutting conditions were selected. The image of instantaneous atom position was obtained through simulation. The material removal phenomenon, the process of surface formation, Potential energy and workpiece temperature changes were analyzed. It was found that the chips and the machined surface during the nano-cutting of titanium metal are formed by the release of lattice energy and the continuous extension of dislocations. The elastic recovery and lattice reconstruction of the machined surface atoms can slow the overall trend of potential energy and temperature and subject it to slight fluctuations.