中文摘要：

成双的边界(TB ) 是影响水晶的材料的机械性质的关键因素。我们调查了在过去的十年期间击碎 TB 的机制的内在的疲劳。击碎机制的疲劳上的 TB 取向的效果与唯一的 TB 经由一系列成年 Cu bicrystals 的周期的变丑被揭示。而且，结晶的取向的联合效果和击碎机制的疲劳上的叠的差错精力(SFE ) 通过多晶的 Cu 和 Cu 合金的周期的变丑被澄清。两发展在将提供含意为金属性的材料的疲劳性能的改进优化界面的设计的这份报告被考察。

英文摘要：

Twin boundaries（TBs） are key factors influencing the mechanical properties of crystalline materials. We have investigated the intrinsic fatigue cracking mechanisms of TBs during the past decade. The effects of TB orientations on the fatigue cracking mechanisms were revealed via cyclic deformation of a series of grown Cu bicrystals with a sole TB. Furthermore, the combined effects of crystallographic orientation and stacking fault energy（SFE） on the fatigue cracking mechanisms were clarified through cyclic deformation of polycrystalline Cu and Cu alloys. Both developments were reviewed in this report which will provide implications to optimize the interfacial design for the improvement of fatigue performance of metallic materials.