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
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Volume62Issue:11Pages:1916-1929
AbstractNanometric 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.
Keywordmolecular dynamics simulation single crystal nickel atomic displacement vector crystal slip system shunt point
DOI10.1007/s11431-019-9520-8
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000496033900005
PublisherSCIENCE PRESS
Citation statistics
Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64170
Collection机电工程学院
Corresponding AuthorZhu ZongXiao
AffiliationLanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
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.
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