Dependence of strength and ductility of coarse-grained metals on the nanotwin volume fraction

Abstract eng:
Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions have both high strength and good ductility, Here, numerical simulations based on the strain gradient plasticity model and the Johnson—Cook failure criterion are carried out to investigate effects of shape and volume fraction of the NT regions on the strength and ductility of CG metals, Our results indicate that they have significant effects on both properties and that the shape effects also change with the volume fraction,

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