Issue |
MATEC Web Conf.
Volume 80, 2016
NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes
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|
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Article Number | 02011 | |
Number of page(s) | 8 | |
Section | MS2: Microstructure modeling in forming processes | |
DOI | https://doi.org/10.1051/matecconf/20168002011 | |
Published online | 24 October 2016 |
Compaction simulation of nano-crystalline metals with molecular dynamics analysis
Center of Excellence in Structures and Earthquake Engineering, Department of Civil Engineering, Sharif University of Technology, P.O. Box. 11365-9313, Tehran, Iran
a Corresponding author: arkhoei@sharif.edu
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.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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