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

• ARTICLES • 上一篇    

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
  • 收稿日期:2021-08-23 修回日期:2022-02-06 发布日期:2022-09-08
  • 通讯作者: Min Lai, Feng-Zhou Fang E-mail:laimin@tju.edu.cn;fzfang@tju.edu.cn
  • 基金资助:
    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).

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).

摘要: 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

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

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