Advances in Manufacturing ›› 2022, Vol. 10 ›› Issue (3): 356-367.doi: 10.1007/s40436-022-00399-w

• ARTICLES • Previous Articles    

Molecular dynamics study on surface formation and phase transformation in nanometric cutting of β-Sn

Zhi-Fu Xue1, Min Lai1, Fei-Fei Xu1, Feng-Zhou Fang1   

  1. State Key Laboratory of Precision Measuring Technology and Instruments, Laboratory of Micro-Nano Manufacturing Technology, Tianjin University, Tianjin 300072, People's Republic of China
  • Received:2021-08-23 Revised:2022-02-06 Published:2022-09-08
  • Supported by:
    Funding was provided by Science Challenge Project (Grant No. TZ2018006-0201-01), National Natural Science Foundation of China (Grant Nos. 51605327, 51805499) and State Administration of Foreign Experts Affairs (Grant No. B07014).

Abstract: Atomic motion and surface formation in the nanometric cutting process of β-Sn are investigated using molecular dynamics (MD). A stagnation region is observed that changes the shape of the tool edge involved in nanometric cutting, resulting in a fluctuation in the cutting forces. It is found that single-crystal tin releases the high compressive stress generated under the tool pressure through slip and phase transformation. The tin transformation proceeds from a β-Sn structure to a bct-Sn structure. The effects of the cutting speed, undeformed chip thickness (UCT) and tool edge radius on material removal are also explored. A better surface is obtained through material embrittlement caused by a higher speed. In addition, a smaller UCT and sharper tool edge help reduce subsurface damage.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00399-w

Key words: β-Sn, Molecular dynamics (MD), Nanometric cutting, Surface formation, Phase transformation