Mechanical response of nanoindentation and material strengthening mechanism of nt-cBN superhard materials based on molecular dynamics

Hao, Zhaopeng; Zhang, Han; Fan, Yihang

doi:10.1016/j.ijrmhm.2022.105844

Cited by 5 publications

(1 citation statement)

References 49 publications

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“…The CdTe workpiece is set as deformable while a single abrasive grain is modeled as a repulsive sphere by the "fix indent" command from LAMMPS. It inserts a spherical indenter within a simulation box [37][38][39]. The interaction between workpiece atoms and abrasive grain is described by:…”

Section: Simulation Methodsmentioning

confidence: 99%

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Liu,

Yip,

et al. 2023

Nanomaterials

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Cadmium telluride (CdTe) is known as an important semiconductor material with favorable physical properties. However, as a soft-brittle material, the fabrication of high-quality surfaces on CdTe is quite challenging. To improve the fundamental understanding of the nanoscale deformation mechanisms of CdTe, in this paper, MD simulation was performed to explore the nano-grinding process of CdTe with consideration of the effects of grain size and grinding depth. The simulation results indicate that during nano-grinding, the dominant grinding mechanism could switch from elastic deformation to ploughing, and then cutting as the grinding depth increases. It was observed that the critical relative grain sharpness (RGS) for the transition from ploughing to cutting is greatly influenced by the grain size. Furthermore, as the grinding depth increases, the dominant subsurface damage mechanism could switch from surface friction into slip motion along the <110> directions. Meanwhile, as the grain size increases, less friction-induced damage is generated in the subsurface workpiece, and more dislocations are formed near the machined groove. Moreover, regardless of the grain size, it was observed that the generation of dislocation is more apparent as the dominant grinding mechanism becomes ploughing and cutting.

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Section: Simulation Methodsmentioning

confidence: 99%

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Liu,

Yip,

et al. 2023

Nanomaterials

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Work hardening of Ni-based single crystal alloy in vibration grinding based on molecular dynamics method

Hao,

Liu,

Fan

2024

Archiv.Civ.Mech.Eng

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Nanotwinning-induced pseudoplastic deformation in boron carbide under low temperature

2023

International Journal of Mechanical Sciences

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Mechanical response of nanoindentation and material strengthening mechanism of nt-cBN superhard materials based on molecular dynamics

Cited by 5 publications

References 49 publications

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Work hardening of Ni-based single crystal alloy in vibration grinding based on molecular dynamics method

Nanotwinning-induced pseudoplastic deformation in boron carbide under low temperature

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