Nano-cutting Temperature Field Distribution and the Influence of Anisotropy on Cutting Temperature of Single Crystal Germanium

In order to understand the nano-cutting properties of single crystal germanium and improve the optical surface quality of nano-germanium devices, the three-dimensional molecular dynamics (MD) method was firstly applied to investigate the temperature distribution of the material atoms during the nano-cutting process of single crystal germanium. The anisotropy effect of Ge (100), (110) and (111) on the cutting temperature and the influence of cutting temperature on cutting force were investigated. The results show that the highest cutting temperature during the cutting process is distributed among the chips, reaching 460 K. There is also a high temperature region in the friction zone of the tool back face, and the highest temperature is above 400 K. Among the three different crystal planes, the highest cutting temperature exists on the surface of Ge (111) crystal. Atomic arrangement is the most intensive in Ge (111), namely, Ge (111) is the densely packed surface of the single crystal germanium, which releases the most energy. What's more, cutting temperature has also made an impact on the cutting force. As the cutting temperature increases, the cutting force of the material atoms is reduced.