Molecular dynamics simulation of chip formation mechanism in single-crystal nickel nanomachining

doi:10.1007/s11431-019-9520-8

IR > 机电工程学院

	Molecular dynamics simulation of chip formation mechanism in single-crystal nickel nanomachining
	Zhu ZongXiao; Peng Bin; Feng RuiCheng; Wang LinJun; Jiao Shi; Dong Yun
	2019-11
发表期刊	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN	1674-7321
卷号	62 期号:11 页码:1916-1929
摘要	Nanometric machining simulations of single-crystal nickel were performed using molecular dynamics. The atomic displacement vector method was applied to study the relationship between defect displacement vectors and the crystal slip system during different deformation stages as well as the displacement trend characteristics of workpiece atoms under different deformations. The arrangement characteristics of atoms in the machining region, relative density of atoms at different machining zones, and proportion of different atoms were investigated in detail. In addition, the atom shunt phenomenon was observed by studying the displacement trend of the atoms adjacent to the machining tool, and a method for determining the location of the shunt point was determined. Moreover, direct evidence of crystal transition caused by temperature was obtained. The effects of machining depth on workpiece damage, surface flatness, and workpiece temperature were investigated. With increasing machining depth, the chip gradually changed from spherical to strip-shaped, the damage depth of workpiece gradually increased, but the atomic arrangement of the machined surface became neater. Simultaneously, the dislocation reaction of subsurface defects was studied, and the rationality of the reaction was analyzed using an energy criterion. Furthermore, the overall temperature of the workpiece increased, but the temperature of the chip part gradually decreased.
关键词	molecular dynamics simulation single crystal nickel atomic displacement vector crystal slip system shunt point
DOI	10.1007/s11431-019-9520-8
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS记录号	WOS:000496033900005
出版者	SCIENCE PRESS
EI入藏号	20194507622620
EI主题词	Molecular dynamics
EI分类号	548.1 Nickel - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 931.3 Atomic and Molecular Physics - 933.1 Crystalline Solids
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64170
专题	机电工程学院
通讯作者	Zhu ZongXiao
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Zhu ZongXiao,Peng Bin,Feng RuiCheng,et al. Molecular dynamics simulation of chip formation mechanism in single-crystal nickel nanomachining[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2019,62(11):1916-1929.
APA	Zhu ZongXiao,Peng Bin,Feng RuiCheng,Wang LinJun,Jiao Shi,&Dong Yun.(2019).Molecular dynamics simulation of chip formation mechanism in single-crystal nickel nanomachining.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,62(11),1916-1929.
MLA	Zhu ZongXiao,et al."Molecular dynamics simulation of chip formation mechanism in single-crystal nickel nanomachining".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 62.11(2019):1916-1929.