文献类型：期刊文献

英文题名：Molecular dynamics simulation of nanocutting mechanisms in NiTi shape memory alloys: influence of crystal orientation on machining behavior

作者：Zhang, Ping[1];Li, Guohong[1];Jiang, Xiaomin[1];Yu, Yan[2]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China;[2]Qingdao Univ Technol, Coll Intelligent Mfg, Qingdao 266520, Peoples R China

年份：2025

卷号：48

期号：1

外文期刊名：JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001622493900038)、、WOS

基金：This study was funded by several organizations, including the National Natural Science Foundation of China under grant numbers 51705270 and the Shandong Qingchuang Science and Technology Project (grant number 2019KJB022).

语种：英文

外文关键词：NiTi alloy; Nanocutting; Crystal orientation; Phase transformation; Molecular dynamics simulation

外文摘要：This study investigates the influence of crystal orientation on the nanocutting behavior of nickel-titanium (NiTi) shape memory alloys using molecular dynamics simulations. Key parameters, such as cutting force, temperature, subsurface morphology, stress distribution, atomic structure evolution, and phase transformation mechanisms, are analyzed across three crystallographic orientations: (100), (110), and (011). The results reveal that crystal orientation significantly affects cutting performance. The (110) orientation exhibits the lowest cutting force and temperature, indicating the most favorable machining characteristics, while the (011) orientation shows the highest cutting resistance. Phase transformation analysis indicates that stress-induced transitions from the B2 phase to the B19 ' phase occur in high-stress regions, enhancing self-healing capabilities. These findings highlight the critical role of crystallographic orientation in optimizing cutting efficiency and surface integrity. The (110) orientation is identified as the optimal configuration for achieving enhanced performance in precision machining of NiTi alloys.