Study on the effect of laser-assisted machining on tool wear based on molecular dynamics simulation

Liu, Zaiwei; Lin, Bin; Liang, Xiaohu; Du, Anyao

doi:10.1016/j.diamond.2020.108022

Cited by 24 publications

(4 citation statements)

References 48 publications

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“…The yellow atoms are CN3 atoms, and the green atoms on the upper and lower surfaces are CN2 atoms. The CN2 atoms on the surface are present during modeling [33,60]. It can be seen from figure 7 that under the effect of indentation, CN3 atoms appear in deeper regions.…”

Section: Microstructure Of Diamond Surface Wearmentioning

confidence: 99%

Exploring the evolution mechanisms of indentation and scratching on diamond structural transformation based on molecular dynamics

Tong,

Yang,

Liu

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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Diamond, possessing high hardness and chemical stability, finds wide-ranging applications across various industries. However, during the friction process, a graphitization phenomenon may occur, which changes the mechanical properties of the diamond. In this study, molecular dynamics simulation was performed using SiC ball to investigate the influence of indentation depth and temperature on the graphitization transition of the diamond surface. The results showed that the dominant factor affecting the sp2 hybridization ratio during the indentation process was stress, while the temperature was the dominant factor during sliding. The results of this study can be used to understand the friction and wear behavior of diamonds and SiC ball and provide theoretical references for the industrial application of diamonds.

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Section: Microstructure Of Diamond Surface Wearmentioning

confidence: 99%

Exploring the evolution mechanisms of indentation and scratching on diamond structural transformation based on molecular dynamics

Tong,

Yang,

Liu

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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show abstract

“…Overall, the laser heating-assisted means can significantly reduce the workpiece hardness and effectively improve the machinability of hard-brittle materials. This result has also been verified by Liu et al [33] that is, the cutting force would be reduced in case of an increase in the laser power. Thus it can be concluded that the laser beam does play a crucial role in reducing the hardness of SiC ceramic.…”

Section: Effect Of Laser Power On Temperaturementioning

confidence: 99%

“…It can be concluded that the laser power should be selected reasonably for an optimized softening effect on the workpiece surface, not that the laser power value is better. This phenomenon is consistent with the previous study about the relationship between the average laser power and the suppression of tool wear discussed by Liu et al [33] Figure 7 shows the x-z sectional snapshot of the atomic stress distribution state of the diamond tool at different laser powers, the 3D stress distribution nephogram at an average laser power of 0 eV ps −1 (I 0 ) is also shown in the figure. It is found that the hydrostatic pressure and the first principal stress tend to be distributed near the tool edge, the tool clearance face, and the tool nose.…”

Section: Stress Analysismentioning

confidence: 99%

Effect of Laser Power on Nanocutting Mechanism of Silicon Carbide Ceramic: A Molecular Dynamics Simulation

Liu,

Wang,

Yang

et al. 2023

Advcd Theory and Sims

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Silicon carbide (SiC) ceramic is being increasingly applied in several engineering fields owing to its excellent saturation electron drift rate. Although much attention is paid to its material removal mechanism, producing a high‐quality SiC surface with a high material removal rate is still a challenging issue. Therefore, there is a need to investigate the material removal mechanism of SiC to improve the processing performance. In this study, the laser heating‐assisted nanocutting models are established using a molecular dynamics method. Then, a laser beam with various energies is irradiated onto the SiC. The influence of average laser power on the nanocutting mechanism of SiC is revealed in terms of the temperature of the machined region, cutting force, stress distribution state, subsurface damage, and tool wear. The results demonstrate that within the scope of this study, the using of laser irradiation methods has a positive effect on the machinability of SiC at the nanoscale, provided that the laser power density does not exceed the ablation threshold. Meanwhile, the results indicate that laser heating‐assisted methods have played an important role in suppressing tool wear. This study has significant theoretical and practical value in processing technology.

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“…A laser-assisted orthogonal cutting model that considers the laser heating and material deformation plasticity was also established to study the cutting force reduction in LAC [197]. Further knowledge from the MD simulation reveals a strong correlation between the cutting anisotropy and the workpiece temperature in Si [198], and a power about 150 eV/ps is estimated for suppressing the diamond tool wear in the laser pre-heat method [199].…”

Section: Laser-assisted Nanometric Cuttingmentioning

confidence: 99%

Nanometric cutting: Mechanisms, practices and future perspectives

Fang

Lai

Wang

et al. 2022

International Journal of Machine Tools and Manufacture

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Study on the effect of laser-assisted machining on tool wear based on molecular dynamics simulation

Cited by 24 publications

References 48 publications

Exploring the evolution mechanisms of indentation and scratching on diamond structural transformation based on molecular dynamics

Exploring the evolution mechanisms of indentation and scratching on diamond structural transformation based on molecular dynamics

Effect of Laser Power on Nanocutting Mechanism of Silicon Carbide Ceramic: A Molecular Dynamics Simulation

Nanometric cutting: Mechanisms, practices and future perspectives

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