纳米孪晶金属和纳米孪晶共价材料的力学行为
Mechanical Behaviors of Nanotwinned Metals and Nanotwinned Covalent Materials
(a) population of yielded grains as a function of uniaxial stress, based on the Sachs model, which is illustrated schematically in the inset (When the proportion of yielded grains reaches 90%, the corresponding uniaxial stress is defined as the yield stress. The curve is an example for an nt-diamond sample with twin thickness of 5 nm and grain size of 20 nm)
(b) calculated hardness of nt-diamond as a function of twin thickness compared to experimental ones (The inset shows the proportion of yielded grain by different slip modes at grain size of 20 nm)
