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] College of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang, China; [2] College of Intelligent Manufacturing, Qingdao University of Technology, Qingdao, 266520, China

年份：2026

卷号：48

期号：1

外文期刊名：Journal of the Brazilian Society of Mechanical Sciences and Engineering

收录：EI(收录号：20254919642274)、Scopus(收录号：2-s2.0-105023487856)

语种：英文

外文关键词：Binary alloys - Crystal atomic structure - Crystal cutting - Crystallography - Molecular orientation - Morphology - Single crystals - Titanium alloys

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. ? The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering 2025.