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
Zhi-Fu Xue
,
Min Lai
,
Fei-Fei Xu
,
Feng-Zhou Fang
. Molecular dynamics study on surface formation and phase transformation in nanometric cutting of β-Sn[J]. Advances in Manufacturing, 2022
, 10(3)
: 356
-367
.
DOI: 10.1007/s40436-022-00399-w
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