A Simulated Investigation of Ductile Response of GaAs in Single-Point Diamond Turning and Experimental Validation

Fan, Pengfei; Ding, Fei; Luo, Xichun; Yan, Yongda; Geng, Yanquan; Wang, Yuzhang

doi:10.1007/s41871-020-00080-5

Cited by 12 publications

(5 citation statements)

References 46 publications

(48 reference statements)

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“…1. The atoms of the single-crystal GaAs workpiece are divided into three zones, namely, the Newton atoms, thermostat atoms, and boundary atoms, following the previously published literature on this topic [19][20][21][22]. The boundary atoms were kept fixed to maintain the symmetry of the initial lattice during MD simulation.…”

Section: Simulation Methodologymentioning

confidence: 99%

Atomic-Scale Friction Studies on Single-Crystal Gallium Arsenide Using Atomic Force Microscope and Molecular Dynamics Simulation

et al. 2021

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This paper provides a fresh perspective and new insights into nanoscale friction by investigating it through molecular dynamics (MD) simulation and atomic force microscope (AFM) nanoscratch experiments. This work considered gallium arsenide, an important III–V direct bandgap semiconductor material residing in the zincblende structure, as a reference sample material due to its growing usage in 5G communication devices. In the simulations, the scratch depth was tested as a variable in the fine range of 0.5–3 nm to understand the behavior of material removal and to gain insights into the nanoscale friction. Scratch force, normal force, and average cutting forces were extracted from the simulation to obtain two scalar quantities, namely, the scratch cutting energy (defined as the work performed to remove a unit volume of material) and the kinetic coefficient of friction (defined as the force ratio). A strong size effect was observed for scratch depths below 2 nm from the MD simulations and about 15 nm from the AFM experiments. A strong quantitative corroboration was obtained between the specific scratch energy determined by the MD simulations and the AFM experiments, and more qualitative corroboration was derived for the pile-up and the kinetic coefficient of friction. This conclusion suggests that the specific scratch energy is insensitive to the tool geometry and the scratch speed used in this investigation. However, the pile-up and kinetic coefficient of friction are dependent on the geometry of the tool tip.

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Section: Simulation Methodologymentioning

confidence: 99%

Atomic-Scale Friction Studies on Single-Crystal Gallium Arsenide Using Atomic Force Microscope and Molecular Dynamics Simulation

et al. 2021

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“…In particular for the high pressure phase transformation, including the amorphization and the structural transformation from the original phase to another crystal phase, acts as one of the dominant mechanisms for the ductile deformation of hard brittle materials in diamond cutting. For instance, the phase transformation from the original crystal phase to the amorphous phase for Si, Ge, GaAs, SiC, GaN, tungsten carbide is the fundamental mechanism leading to their ductile deformation [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108]. In addition, the phase transformation from diamond cubic structure to other structure phase is observed in diamond cutting of single crystal Ge and Si [98,108].…”

Section: Ductile Machinability Of Hard Brittle Materialsmentioning

confidence: 99%

Numerical simulation of materials-oriented ultra-precision diamond cutting: review and outlook

Zhao

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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Ultra-precision diamond cutting is a promising machining technique for realizing ultra-smooth surface of different kinds of materials. While fundamental understanding of the impact of workpiece material properties on cutting mechanisms is crucial for promoting the capability of the machining technique, numerical simulation methods at different length and time scales act as important supplements to experimental investigations. In this work, we present a compact review on recent advancements in the numerical simulations of material-oriented diamond cutting, in which representative machining phenomena are systematically summarized and discussed by multiscale simulations such as molecular dynamics simulation and finite element simulation: the anisotropy cutting behavior of polycrystalline material, the thermos-mechanical coupling tool-chip friction states, the synergetic cutting responses of individual phase in composite materials, and the impact of various external energetic fields on cutting processes. In particular, the novel physics-based numerical models, which involve the high precision constitutive law associated with heterogeneous deformation behavior, the thermo-mechanical coupling algorithm associated with tool-chip friction, the configurations of individual phases in line with real microstructural characteristics of composite materials, and the integration of external energetic fields into cutting models, are highlighted. Finally, insights into the future development of advanced numerical simulation techniques for diamond cutting of advanced structured materials are also provided. The aspects reported in this review present guidelines for the numerical simulations of ultra-precision mechanical machining responses for a variety of materials.

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“…In addition, some scholars have conducted a more detailed MD study on the deformation behavior of GaAs. However, all existing studies focus on the case of smooth surfaces, conducting MD simulations of the cutting process of GaAs on smooth surfaces to explore a series of phenomena in the deformation process [13][14][15]. In fact, from a microscopic point of view, the indenter is in contact with the coarse surface, both in the actual contact case of power devices and in the scratching experiments [16].…”

Section: Introductionmentioning

confidence: 99%

The Dislocation- and Cracking-Mediated Deformation of Single Asperity GaAs during Plowing Using Molecular Dynamics Simulation

Fan

et al. 2022

Micromachines

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This work simulates the plowing process of a single asperity GaAs by diamond indenter using molecular dynamics simulations. The deformation mechanism of asperity GaAs is revealed by examining the topography evolution and stress state during the plowing. This work also investigates the origin of the influence of asperity size, indenter radius and plow depth on the deformation of the asperity GaAs. We observed the initiation and propagation of cracks up to the onset of fracture and the plastic activity near the indenter, obtaining more information usually not available from planar GaAs in normal velocity plowing compared to just plastic activity. The simulations demonstrated the direct evidence of cracking in GaAs induced by plowing at an atomic level and probed the origin and extension of cracking in asperity GaAs. This finding suggests that cracking appears to be a new deformation pattern of GaAs in plowing, together with dislocation-dominated plasticity modes dominating the plowing deformation process. This work offers new insights into understanding the deformation mechanism of an asperity GaAs. It aims to find scientific clues for understanding plastic removal performed in the presence of cracking.

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A Simulated Investigation of Ductile Response of GaAs in Single-Point Diamond Turning and Experimental Validation

Cited by 12 publications

References 46 publications

Atomic-Scale Friction Studies on Single-Crystal Gallium Arsenide Using Atomic Force Microscope and Molecular Dynamics Simulation

Atomic-Scale Friction Studies on Single-Crystal Gallium Arsenide Using Atomic Force Microscope and Molecular Dynamics Simulation

Numerical simulation of materials-oriented ultra-precision diamond cutting: review and outlook

The Dislocation- and Cracking-Mediated Deformation of Single Asperity GaAs during Plowing Using Molecular Dynamics Simulation

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