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Numerical Analysis of Solid-Liquid Two-Phase Abrasive Flow in Microcutting Polycrystalline Materials Based on Molecular Dynamics

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Abstract

Abrasive flow polishing plays an important role as a type of precision nanomachining technology. In this study, the polishing mechanism of abrasive flow was studied using numerical simulations based on molecular dynamics. In order to study the polishing mechanism of polycrystalline materials, the molecular dynamics simulation of three kinds of polycrystalline materials was carried out. The cutting force, energy, friction coefficient, and surface morphology (during the microcutting process) of the three workpiece materials were analyzed. The analysis shows that the adhesion of atoms in the contact area on the workpiece surface will be affected by liquid phase and the type of abrasive particles, and then the surface quality polished by the abrasive flow will also be influenced. The onset of an abrasive flow polishing process involving plastic deformation (including the nucleation and migration of dislocations, grain boundary shape deformation, and deformation twinning) was observed on the workpiece surface. Defects strongly competed with each other in the form of interactions of dislocations and the grain boundaries, resulting in the migration of twin boundaries. A further analysis of the numerical results for different cutting depths and abrasive properties of the workpiece materials will be useful for understanding the different cutting effects.

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Authors and Affiliations

  1. College of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun, 130022, China

    Jun-Ye Li, Wen-Qing Meng, Kun Dong, Xin-Ming Zhang & Wei-Hong Zhao

Authors
  1. Jun-Ye Li
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  2. Wen-Qing Meng
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  3. Kun Dong
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  4. Xin-Ming Zhang
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  5. Wei-Hong Zhao
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Corresponding author

Correspondence to Xin-Ming Zhang.

Additional information

Jun-Ye Li Received PhD degree in mechanical engineering from Changchun University of Science and Technology, Changchun, China?in 2011. Now he works at Changchun University of Science and Technology. His current research interests include mechanical manufacturing and automation, precision and ultra-precision machining, multiphase flow and micro-fiction technology, and detection technology in mechanical manufacturing.

Wen-Qing Meng Received BA degree in mechanical engineering from Dezhou University, Dezhou, China?in 2016. Now he study at Changchun University of Science and Technology. His current research interests include mechanical manufacturing and automation, precision and ultra-precision machining.

Kun Dong Received MA degree in mechanical engineering from Changchun University of Science and Technology, Changchun, China?in 2017. Now he works in Hisense group. His current research interests include mechanical manufacturing and automation, precision and ultra-precision machining.

Xin-Ming Zhang Received PhD degree in mechanical engineering from Changchun University of Science and Technology, Changchun, China?in 2010. Now he works at Changchun University of Science and Technology. His current research interests include mechanical manufacturing and automation, precision and ultra-precision machining.

Wei-Hong Zhao Received ME degree in mechanical engineering from Changchun University of Science and Technology, Changchun, China?in 2005. Now he works at Changchun University of Science and Technology. His current research interests include mechanical manufacturing and automation, precision and ultra-precision machining, multiphase flow and micro-fiction technology, and detection technology in mechanical manufacturing.

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Li, JY., Meng, WQ., Dong, K. et al. Numerical Analysis of Solid-Liquid Two-Phase Abrasive Flow in Microcutting Polycrystalline Materials Based on Molecular Dynamics. Int. J. Precis. Eng. Manuf. 19, 1597–1610 (2018). https://doi.org/10.1007/s12541-018-0187-8

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  • DOI: https://doi.org/10.1007/s12541-018-0187-8

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