Three-dimensional molecular dynamics analysis of processing using a pin tool on the atomic scale

Fang, Te‐Hua; Weng, Cheng‐I

doi:10.1088/0957-4484/11/3/302

Cited by 160 publications

(75 citation statements)

References 24 publications

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“…Morse potential between the tip and the substrate is adopted according to Refs. [16,17], but with only repulsive interaction considered [7]. The Morse potential is written as:…”

Section: Methodsmentioning

confidence: 99%

Ploughing friction and nanohardness dependent on the tip tilt in nano-scratch test for single crystal gold

刘小明

et al. 2015

Computational Materials Science

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a b s t r a c tDifferent from macro-scale scratch, in nano-scale scratch test, the scratching tip is easily tilted, which may display a considerable change of the friction behavior. The ploughing friction and nanohardness dependent on the tip tilt in nano-scratch test for single crystal gold is studied in this paper by using molecular dynamics simulations. The results show that tilting forward (backward) to the scratch direction has a larger effect on the friction coefficient than the case of tilting laterally to the scratch direction. Scratch hardness is also sensitive to the tip tilting forward (backward), while it is insensitive to the tip tilting laterally. Moreover, the local plastic behaviors near tip (pile-up, plastic area, and dislocation evolution) are also dependent on the tip tilt, which may be a major contribution to the mechanism of the nano-scale wear.

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“…Morse potential between the tip and the substrate is adopted according to Refs. [16,17], but with only repulsive interaction considered [7]. The Morse potential is written as:…”

Section: Methodsmentioning

confidence: 99%

Ploughing friction and nanohardness dependent on the tip tilt in nano-scratch test for single crystal gold

刘小明

et al. 2015

Computational Materials Science

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“…For a ductile metal material such as copper, the measured c/a ratio is around 8.0 [20] which theoretically predicts that the deformed layer during the nanometric cutting of copper would have a thickness of up to eight times the contact radius of the tool tip. For single tip tool cutting, it is reported that the deformed layer of the lateral cutting pass will reshape the former machined nanostructures if the distance between the two cutting passes is smaller than a critical value [9,[11][12]. For multi-tip tool cutting, this feed rate issue can be avoided because the nanostructures are formed synchronously by multiple tips with a single cutting pass [9].…”

Section: Experimental Verificationmentioning

confidence: 99%

“…Numerous MD nanometric cutting models were built to emulate the material removal process [10][11][12] and to study the effect of tool geometry on the machined surface quality [13][14][15]. Recently the difference in machining nanostructures between using single tip and multi-tip diamond cutting tools has also been reported [9,16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the shape transferability of nanoscale multi-tip diamond tools in the diamond turning of nanostructures

Luo

Tong

Liang

2014

Applied Surface Science

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In this paper, the shape transferability of using nanoscale multi-tip diamond tools in the diamond turning for scale-up manufacturing of nanostructures has been demonstrated. Atomistic multi-tip diamond tool models were built with different tool geometries in terms of the difference in the tip cross-sectional shape, tip angle, and the feature of tool tip configuration, to determine their effect on the applied forces and the machined nano-groove geometries. The quality of machined nanostructures was characterized by the thickness of the deformed layers and the dimensional accuracy achieved. Simulation results show that diamond turning using nanoscale multi-tip tools offers tremendously shape transferability in machining nanostructures. Both periodic and non-periodic nano-grooves with different cross-sectional shapes can be successfully fabricated using the multi-tip tools. A hypothesis of minimum designed ratio of tool tip distance to tip base width (L/Wf) of the nanoscale multi-tip diamond tool for the high precision machining of nanostructures was proposed based on the analytical study of the quality of the nanostructures fabricated using different types of the multi-tip tools. Nanometric cutting trials using nanoscale multi-tip diamond tools (different in L/Wf) fabricated by focused ion beam (FIB) were then conducted to verify the hypothesis. The investigations done in this work imply the potential of using the nanoscale multi-tip diamond tool for the deterministic fabrication of period and non-periodic nanostructures, which opens up the feasibility of using the process as a versatile manufacturing technique in nanotechnology.

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“…The effect of different interatomic potential on cutting results was studied by Pei et al [14]. The cutting depth was investigated and believed to have a positive correlation with the cutting force [16][17][18][19]. Pei et al [17] investigated the correlation between the cutting depth and the size effect.…”

mentioning

confidence: 99%

Chip formation dependence of machining velocities in nano-scale by molecular dynamics simulations

Tang

2014

Sci. China Technol. Sci.

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In this study, molecular dynamics simulations were carried out to study the effect of machining velocities on the mechanism of chip formation in nano-metric copper. A wide range of cutting velocities was performed from 10 to 2000 m/s, and the microstructure's evolution from a crystalline state to an amorphous state was studied. At the low machining velocity, dislocations were generated from the surface in front of the tool, and the immobile dislocation deduced by the cross slip of dislocation was observed. At the high machining velocity, no crystal dislocation nucleated, but instead disorder atoms were found near the tool. Temperature near the tool region increased with the increasing machining velocities, and the temperature had an important effect on the phase transition of the crystal structure.

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Three-dimensional molecular dynamics analysis of processing using a pin tool on the atomic scale

Cited by 160 publications

References 24 publications

Ploughing friction and nanohardness dependent on the tip tilt in nano-scratch test for single crystal gold

Ploughing friction and nanohardness dependent on the tip tilt in nano-scratch test for single crystal gold

Investigation of the shape transferability of nanoscale multi-tip diamond tools in the diamond turning of nanostructures

Chip formation dependence of machining velocities in nano-scale by molecular dynamics simulations

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