The local mechanical properties near the $(1\overline{1}0)$Σ3/[111] symmetric tilt grain boundary in a high purity aluminum bicrystal were studied by the nanoindentation technique. The first pop-in load and its width significantly decreased near / at the grain boundary compared to those in the grain interior. The critical stress required to nucleate dislocations at the grain boundary was estimated to be notably lower than that in the grain interior. Moreover, it was found that the slope of the load-penetration curve prior to the first pop-in was smaller near the grain boundary than in the grain interior. This result was discussed in terms of possible micro plasticity effects and decreasing the elastic modulus in the close vicinity of the grain boundary.

附近的局部力学性能 $（\mathrm{1个}\overline{\mathrm{1个}}0）$利用纳米压痕技术研究了高纯铝双晶中的Σ3/ [111]对称倾斜晶界。与晶格内部相比，晶界附近/处的第一个弹入载荷及其宽度显着减小。据估计，使晶界处的位错成核所需的临界应力明显低于晶粒内部的临界应力。而且，发现在第一次弹出之前的载荷穿透曲线的斜率在晶界附近比在晶粒内部更小。从可能的微观可塑性效应和降低晶界附近的弹性模量的角度讨论了这一结果。