Study on bonding phenomena of high strength aluminium alloy in nano- scale analysis
BH Liu and QC Hsu, MATERIALS RESEARCH INNOVATIONS, 18 (2014).
The bonding properties of three kinds of multi-alloy materials Al0.9Cu0.1, Al0.9Cu0.035Mg0.065 and Al0.9Cu0.03Mg0.06Fe0.01 in nano- scale are studied. The molecular dynamics method and the embedded atom potential were used to simulate the bonding properties in nano-scale under the assumption of the single crystal structure of face centred cubic and the motion of each atom in the system dominated by Newton's laws of motion. The total energy of the simulated system includes the molecular potential energy and embedded atom potential. The aluminium alloy is divided into upper and lower blocks while the former moves downward to the latter maintained steady during simulation. Simulation comprises three stages: compressing, holding and stretching. In the first two simulation stages, simulation results depict that in stretching stage the multilayer slips occur along (111) surfaces, and the final plastic deformation leads to strain hardening and the fracture of ductile shear.
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