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Friction behavior of nanocrystalline nickel near the Hall-Petch breakdown

Chamani, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.triboint.2016.11.020
  3. Publisher: Elsevier Ltd , 2017
  4. Abstract:
  5. Large-scale molecular dynamics simulations are carried out to investigate the friction behavior of nanocrystalline nickel (Ni) at low temperature. Grain sizes ranging from 4–11 nm are used to explore the behavior of nanocrystalline Ni near the Hall-Petch breakdown. Effects of grain size, grain morphology and scratch depth on coefficient of friction (COF) and deformation mechanism of nanocrystalline Ni are investigated. Reduction of the COF with the refinement of grain size in nanocrystalline nickel is observed, however, for a grain size of 5 nm this trend is observed to be reversed. It is also found that scratch depth can influence the estimation of friction behavior of nanocrystalline nickel. © 2016 Elsevier Ltd
  6. Keywords:
  7. Coefficient of friction ; Grain boundary ; Molecular dynamics ; Nanoscratch ; Friction ; Grain boundaries ; Grain refinement ; Grain size and shape ; Low temperature engineering ; Molecular dynamics ; Nickel ; Temperature ; Tribology ; Coefficient of frictions ; Deformation mechanism ; Friction behavior ; Grain morphologies ; Large-scale molecular dynamics ; Nano-crystalline nickel ; Nano-scratch ; Nanocrystalline Ni ; Nanocrystals
  8. Source: Tribology International ; Volume 107 , Volume 107 , 2017 , Pages 18-24 ; 0301679X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0301679X16304431