Loading path and strain rate effects on the deformation behavior of 0001 textured nanocrystalline magnesium: An atomic-scale investigation
H Zhao and XJ Yang and Y Peng and L Wu and Y Wu and BD Shi, JOURNAL OF MAGNESIUM AND ALLOYS, 13, 839-857 (2025).
DOI: 10.1016/j.jma.2024.03.018
Molecular dynamics (MD) simulation is employed to investigate the
deformation behavior under various loading paths and strain rates of
nanocrystalline magnesium (NC Mg) with 0001 texture. Atomic-scale
structural evolution of NC Mg was performed under uniaxial and biaxial
loadings. In tension process, compression twins and basal slip dominate,
while the compression process is dominated by tension twins. The
activation mechanism of twinning is highly sensitive to the loading path
and grain orientation. Meanwhile, the effect of strain rate on the
structural evolution of NC Mg was investigated. It is found that the
effect of strain rate on the plastic deformation of NC Mg is reflected
through the plasticity delays and the way to release the stress. As the
strain rate decreases, the plastic deformation mechanism gradually
changes from intragranular to grain boundary. Some significant potential
deformation mechanisms in the loading process were studied. It is
observed that 112
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