ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Molecular dynamics (MD) simulations of nanometric scratching with diamond tip areconducted on single crystal copper crystal plane (010), and MD simulations are carried out toinvestigate the mechanism of material removal and the generation of defects on the surface,subsurface and inner of material. During the process of diamond tip scratching the surface of singlecrystal copper on conditions of different scratching speeds, depths and widths. We achieved theforming details of the chip. While the generation and moving process of defects, such asdislocation, are recorded. The different times of atomic displacement and interaction force are alsoshown through MD simulation. The evolvement of the lattice pattern in the abrasive processes areanalysed by radial distribution function (RDF) and computing the changes of workpiece’s atomicdisplaces and forces. At the same time, the lattice reconfiguration and the onset and the evolvementprocess of defects and are analysed by RDF and atomic perspective method, respectively. Thesimulation results show that scratching speed play role in the course of the form of removing chips,and that different scratching widths and depths of tool have effect on onset and evolvement oflattice defects of workpiece in abrasive processes. This study can give more fundamentalunderstanding of nanosconstruction from atomistic motions and contribute to the design,manufacture and manipulation of nano-devices
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.6.pdf
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