Abstract Scope |
There are a wide range of structural applications that desire advanced materials with high strength-to-weight ratios in combination with other outstanding mechanical properties. Mg alloys offer a potential solution, but successful incorporation of Mg alloys into engineering designs is, however, hindered by their limited plasticity. One of the important and puzzling underlying mechanisms governing their plastic behavior is deformation twinning, which form in these materials under straining. The development of twins both inside the crystal and at crystalline interfaces has mostly been addressed at the atomistic scale level. In our research, we employ crystal plasticity-based micromechanics model to establish and understand the effects of material interfaces, whether they arise from free surfaces, grain boundaries, phase boundaries, or precipitates, on the expansion of twin embryos, twin-tip propagation and twin boundary migration. In this talk, recent results from a number of modeling and experimental studies will be presented and discussed. |