Molecular dynamics simulation and experiment research of cutting-tool wear mechanism for cutting aluminum alloy

Dong, Guojun; Wang, Xin; Gao, Shengdong

doi:10.1007/s00170-018-1641-6

Cited by 29 publications

(14 citation statements)

References 21 publications

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“…To describe the bonding between C–C atoms, a popular potential function called Tersoff (an analytical bond-order potential or ABOP version) that can simulate the phase transformation from diamond to amorphous and graphite structures is implied in this study 9 , 10 , 47 – 49 . We select an open-source software named LAMMPS and OVITO to simulate and explore the model 50 , 51 .…”

Section: Methodsmentioning

confidence: 99%

Phase transformation and subsurface damage formation in the ultrafine machining process of a diamond substrate through atomistic simulation

Nguyen

Fang

2021

Sci Rep

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This report explores the effects of machining depth, velocity, temperature, multi-machining, and grain size on the tribological properties of a diamond substrate. The results show that the appearance of graphite atoms can assist the machining process as it reduces the force. Moreover, the number of graphite atoms relies on the machining speed and substrate temperature improvement caused by the friction force. Besides, machining in a machined surface for multi-time is affected by its rough, amorphous, and deformed surface. Therefore, machining in the vertical direction for multi-time leads to a higher rate of deformation but a reduction in the rate of graphite atoms generation. Increasing the grain size could produce a larger graphite cluster, a higher elastic recovery rate, and a higher temperature but a lower force and pile-up height. Because the existence of the grain boundaries hinders the force transformation process, and the reduction in the grain size can soften the diamond substrate material.

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Section: Methodsmentioning

confidence: 99%

Phase transformation and subsurface damage formation in the ultrafine machining process of a diamond substrate through atomistic simulation

Nguyen

Fang

2021

Sci Rep

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“…LAM can obtain a higher quality workpiece surface and is a technology with potential [19]. Dong GJ and other scholars used molecular dynamics to simulate the diamond-mirror cutting of large-diameter aluminum alloy, revealing the wear mechanism in the cutting process [20]. Zou L and other scholars used molecular dynamics to study the catalytic simulation of metal iron on the transformation of diamond crystals into a graphite structure and analyzed the main causes of diamond tool wear [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Multi-Angle Precision Microcutting of a Single-Crystal Copper Surface Based on Molecular Dynamics

et al. 2022

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The molecular dynamics method was used to study the removal mechanism of boron nitride particles by multi-angle microcutting of single-crystal copper from the microscopic point of view. The mechanical properties and energy conversion characteristics of single-crystal copper during microcutting were analyzed and the atomic displacement and dislocation formation in the microcutting process are discussed. The research results showed that during the energy transfer between atoms during the microcutting process of boron nitride particles, the crystal lattice of the single-crystal copper atom in the cutting extrusion region was deformed and displaced, the atomic temperature and thermal motion in the contact area between boron nitride particles and Newtonian layer of workpiece increased, the single-crystal copper atom lattice was defective, and the atomic arrangement structure was destroyed and recombined. The interface of different crystal structures formed a dislocation structure and produced plastic deformation. With the increase of the impact cutting angle, the dislocation density inside the crystal increased, the defect structure increased and the surface quality of the workpiece decreased. To protect the internal structure of the workpiece and improve the material removal rate, a smaller cutting angle should be selected for the abrasive flow microcutting function, which can reduce the formation of an internal defect structure and effectively improve the quality of abrasive flow precision machining. The research conclusions can provide a theoretical basis and technical support for the development of precision abrasive flow processing technology.

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“…Additionally, the diffusion wear of the diamond tool was shown in the study of machining aluminum alloy [30] by utilizing MD simulations. These works have proved that MD simulation is an effective technique to unravel the wear mechanism of diamond cutting tools.…”

Section: Introductionmentioning

confidence: 99%

An atomistic investigation on the wear of diamond during atomic force microscope tip-based nanomachining of gallium arsenide

Fan

Goel

Luo

et al. 2021

Computational Materials Science

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This paper investigated the wear mechanism of diamond during the atomic force 2 microscope (AFM) tip-based nanomachining of Gallium Arsenide (GaAs) using molecular dynamics (MD) simulations. The elastic-plastic deformation at the apex of the diamond tip was observed during the simulations. Meanwhile, a transition of the diamond tip from its initial cubic diamond lattice structure sp 3 hybridization to graphite lattice structure sp 2 hybridization was revealed. Graphitization was, therefore, found to be the dominant wear mechanism of the diamond tip during the nanometric cutting of single crystal gallium arsenide for the first time. The various stress states, such as hydrostatic stress, shear stress, and von Mises stress within the diamond tip and the temperature distribution of the diamond tip were also estimated to find out the underlying mechanism of graphitization. The results showed that the cutting heat during nanomachining of GaAs would mainly lead to the graphitization of the diamond tip instead of the high shear stress-induced transformation of the diamond to graphite. The paper also proposed a new approach to quality the graphitization conversion rate of diamond tip.

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Molecular dynamics simulation and experiment research of cutting-tool wear mechanism for cutting aluminum alloy

Cited by 29 publications

References 21 publications

Phase transformation and subsurface damage formation in the ultrafine machining process of a diamond substrate through atomistic simulation

Phase transformation and subsurface damage formation in the ultrafine machining process of a diamond substrate through atomistic simulation

Numerical Analysis of Multi-Angle Precision Microcutting of a Single-Crystal Copper Surface Based on Molecular Dynamics

An atomistic investigation on the wear of diamond during atomic force microscope tip-based nanomachining of gallium arsenide

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