Effect of boundary misorientation, grain size distribution and dislocation density on tensile behavior of nanostructured metals

研究了晶界取向差对纳米结构铝拉伸行为的影响。由大角度晶界包围的超细晶试样的强度远高于由小角度晶界包围的亚晶试样的强度，表明大角度晶界比小角度晶界更有效地强化。也有人建议，在纳米结构的金属屈服机制是不同的，这取决于在样品中的边界取向差分布。

The effect of boundary misorientation on tensile behavior of nanostructured aluminium produced by ultrahigh strain deformation and annealing has been investigated. The strength of ultrafine grained samples mainly surrounded by high-angle boundaries is much higher than that of subgrained samples mainly composed of low-angle boundaries, indicating that high-angle boundaries are more effective for strengthening than low-angle boundaries. It has also been suggested that yielding mechanisms in nanostructured metals is different depending on the boundary misorientation distribution in the samples.