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Fundamentals of Nanometric Cutting of Nanotwinned Copper

  • Junjie Zhang
  • Yongda Yan
  • Tao Sun
Chapter
Part of the Springer Tracts in Mechanical Engineering book series (STME)

Abstract

Nanotwinned (NT) Cu containing a high density of growth twin boundaries (TBs) is one emerging precious metal for its extraordinary properties of high strength, intermediate ductility, and high electric conductivity. In the present work, we elucidate the deformation mechanisms of nanotwinned Cu subjected to the diamond cutting-based nanometric cutting by means of molecular dynamics simulations, with an emphasis on examining the influence of intrinsic microstructural parameters and extrinsic machining parameter on the nanometric cutting processes. The underlying deformation mechanisms of the materials are further correlated with the evolution of machining forces and the formation of machined surface and chips. Our simulation results indicate that dislocation slip, dislocation–TBs interactions, and TBs-associated mechanisms work in parallel in the plastic deformation of the NT Cu. In particular, dislocation–TB interactions and TBs-associated mechanisms are strongly dependent on rake angle of cutting tool, TB inclination angle, TB spacing, and grain size, which leads to strong anisotropic cutting response of NT Cu that originates from the heterogeneous localized deformation.

Keywords

Nanometric cutting Nanotwinned cu Dislocation–TB interactions Material removal Molecular dynamics 

Notes

Acknowledgements

The authors greatly acknowledge financial support from the Science Challenge Project (No. TZ2018006-0201-02), the Fundamental Research Funds for the Central Universities, the National Natural Science Foundation of China (51405106) and the State Key Laboratory of Precision Measuring Technology and Instruments (Tianjin University) (PIL1405).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Center for Precision Engineering, Harbin Institute of TechnologyHarbinChina

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