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This paper develops a single-crystal plasticity model with Johnson–Cook-type hardening laws to examine the strain rate and temperature sensitivities of magnesium (Mg). Slip, twinning and their interactions are deemed the dominant plastic mechanisms. The twinning-induced lattice reorientation is implemented by taking the initial grain after reorientation as a “new” grain with an updated orientation...
For micron-scale elasto-plastic deformations, a theory of strain gradient elasto-plasticity (SGEP) has been established to explain some phenomena that have recently attracted intensive investigations, which include size effects around the elastic limit and in plastic hardening, the anomalous Bauschinger effect, plastic softening, and the unconventional load–unload hysteresis loops. Based on the fact...
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