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  1. Mechanical characteristics of die-wall friction on the compaction process of metal nano-powders
Mechanical characteristics of die-wall friction on the compaction process of metal nano-powders
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Mechanical characteristics of die-wall friction on the compaction process of metal nano-powders

Khoei, A.R

Mechanical characteristics of die-wall friction on the compaction process of metal nano-powders

Khoei, A.R ; Sharif University of Technology | 2024

29 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.powtec.2024.119987
  3. Publisher: 2024
  4. Abstract:
  5. The die-wall friction is one of the influential mechanical factors in the metal nano-powder compaction process that can noticeably impress the densification behavior of nanoparticles. In this study, the uniaxial cold compaction process of aluminum nano-powders, which are initially loaded into the nickel die-walls, is analyzed using the molecular dynamics (MD) method. The influence of die-wall friction is studied on the nano-powder compaction process. The results illustrate the effect of frictional die-walls on the characteristics of relative density–pressure and stress–strain curves, the pressure distribution of nano-powders, and the final green product. The evolution of the die-wall friction coefficient on the compaction velocity and temperature is determined during the compaction process. Applying the nonlinear regression method, an empirical relation is derived to estimate the frictional behavior of die-walls at different relative densities. It is demonstrated that the proposed computational model has acceptable accuracy to evaluate the die-wall friction during the nano-powder compaction process. © 2024 Elsevier B.V
  6. Keywords:
  7. MD analysis ; Nano-powders ; Dies ; Friction ; Metal nanoparticles ; Molecular dynamics ; Nanostructured materials ; Powder metals ; Regression analysis ; Aluminum ; Nanoparticle ; Nickel ; Compaction process ; Die wall ; Die wall friction ; Die-wall friction coefficient ; Friction coefficients ; Mechanical characteristics ; Molecular dynamic analysis ; Nano powders ; Powder compactions ; Relative density ; Biomechanics ; Die-wall friction ; Finite element analysis ; Mathematical parameters ; Metal nano-powder ; Particle size ; Powder ; Response surface method ; Temperature ; Compaction
  8. Source: Powder Technology ; Volume 444 , 2024 ; 00325910 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0032591024006302