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Compaction simulation of nano-crystalline metals with molecular dynamics analysis

Khoei, A. R ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1051/matecconf/20168002011
  3. Publisher: EDP Sciences , 2016
  4. Abstract:
  5. The molecular-dynamics analysis is presented for 3D compaction simulation of nano-crystalline metals under uniaxial compaction process. The nano-crystalline metals consist of nickel and aluminum nano-particles, which are mixed with specified proportions. The EAM pair-potential is employed to model the formation of nano-particles at different temperatures, number of nano-particles, and mixing ratio of Ni and Al nano-particles to form the component into the shape of a die. The die-walls are modeled using the Lennard-Jones inter-atomic potential between the atoms of nano-particles and die-walls. The forming process is model in uniaxial compression, which is simulated until the full-dense condition is attained at constant temperature. Numerical simulations are performed by presenting the densification of nano-particles at different deformations and distribution of dislocations. Finally, the evolutions of relative density with the pressure as well as the stress-strain curves are depicted during the compaction process
  6. Keywords:
  7. Compaction ; Crystalline materials ; Molecular dynamics ; Nanocrystalline alloys ; Nickel ; Numerical methods ; Stress-strain curves ; Compaction process ; Constant temperature ; Distribution of dislocations ; Interatomic potential ; Nanocrystallines ; Relative density ; Uni-axial compression ; Uniaxial compaction ; Nanoparticles
  8. Source: MATEC Web of Conferences, 4 July 2016 through 7 July 2016 ; Volume 80 , 2016 ; 2261236X (ISSN)
  9. URL: https://www.matec-conferences.org/articles/matecconf/abs/2016/43/matecconf_numi2016_02011/matecconf_numi2016_02011.html