Molecular Dynamics Study of the Interface Effect on theFracture of a Heterostructure under Uniaxial Tension
2021
The effect of the interface on the
fracture of metal heterostructures under constant-rate uniaxial
tension was investigated by molecular dynamics simulations. It
was found that the presence of an interface aligned in the
direction of the tensile loading axis leads to the strengthening
of the sample. A cause of the observed strengthening is the
inflow of atoms of one metal into the voids in the subsystem of
another metal formed during stretching. In addition, the
Chernov–Luders bands propagating in the neck region in the
copper and silver components of the heterostructure change their
paths when crossing the interface, which results in smaller
displacements of the atomic planes in each of the metals.
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