Molecular dynamics simulation and experimental investigation on deformation anisotropy of gallium nitride Ga-plane and N-plane nano-scratching

Song, Jian; Zhou, Hai; Xu, Y. F.; Wang, Jiang; Zhang, Chunwei

doi:10.1016/j.ssc.2022.114866

Cited by 10 publications

(2 citation statements)

References 19 publications

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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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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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show abstract

“…This implies a realistic, reliable and fast modeling of all the physical phenomena that characterize forming operations such as the behavior of the material, the wear of the tools, and the influence of the parameters of the operation [7][8][9]. Works have studied the feasibility of increasing the temperature as an approach to solve the problem of ductility of Al 1050 and increasing the strength of the material [10][11][12][13]. In addition, the amount of elongation and the level of the forming limit diagram were reduced, but increased at low speeds.…”

Section: Introductionmentioning

confidence: 99%

Study on the Thermal Sensitivity of Anisotropic Thin Sheets: Application to Hot Bulge Tests

ELADEB,

NASRI,

BECHEIKH

et al. 2024

mech

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This article presents a study on the thermal sensitivity of anisotropic thin sheets, focusing specifically on their behavior during hot bulge tests. Anisotropic materials exhibit different mechanical properties in different directions, and understanding their response to thermal loading is crucial for various engineering applications. The experimental investigation involves subjecting thin sheets of anisotropic materials to controlled thermal conditions and measuring their response. The hot bulge test, a well-established method, is employed to analyze the behavior of the sheets under elevated temperatures. This test involves applying a controlled internal pressure to a heated circular and elliptical specimen, causing it to deform and form a bulge. Through this study, the thermal sensitivity of anisotropic thin sheets is characterized by analyzing the bulge height, bulge profile, and strain distribution. The influence of various factors, such as temperature, material anisotropy, and loading rate, is examined to understand their effects on the sheet's response. Experimental results reveal significant variations in the thermal sensitivity of anisotropic thin sheets, depending on the material's orientation and temperature. The study demonstrates that certain orientations exhibit greater sensitivity to thermal loading, leading to distinct bulge profiles and strain distributions. Furthermore, numerical simulations are conducted using finite element analysis to validate and complement the experimental findings. The simulation models incorporate the anisotropic material properties and the thermal boundary conditions, enabling a comprehensive understanding of the thermal sensitivity behavior observed experimentally. The outcomes of this study provide valuable insights into the thermal behavior of anisotropic thin sheets, particularly in the context of hot bulge tests. The findings contribute to the knowledge base of material characterization and can aid in the design and optimization of structures and components subjected to thermal loading, where anisotropic materials are involved.

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Unveiling the effect of crystal orientation on gallium nitride cutting through MD simulation

Wang

Zhang

Hao

et al. 2023

International Journal of Mechanical Sciences

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Molecular dynamics simulation and experimental investigation on deformation anisotropy of gallium nitride Ga-plane and N-plane nano-scratching

Cited by 10 publications

References 19 publications

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

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

Study on the Thermal Sensitivity of Anisotropic Thin Sheets: Application to Hot Bulge Tests

Unveiling the effect of crystal orientation on gallium nitride cutting through MD simulation

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