【摘要】 系统地研究了<110>取向倾侧铜-铋三晶的断裂行为,并与铜-铋双晶的结果比较,结果表明:三叉结点对不同取向的铜-铋三晶的断裂行为产生不同程度的影响,使得同一晶界在铜-铋三晶和双晶中有不同的断裂行为,三叉结附近的高内应力引起范性形变的不均匀性,使三晶中出现滑移多相性和晶粒的旋转。结合三叉结点附近应力场的计算,对此进行了讨论。更多还原

【Abstract】 The fracture behavior of <110> tilt Cu-Bi tricrystals were studied and a contrast with that of Cu-Bi bicrystals was made. The results indicate that the triple junction affected the fracture behaviors of Cu-Bi tricrystals and made a grain boundary exhibit different fracture modes in bicrystal and tricrystal,The high internal stress near triple junction produced incompatibility of plastic deformation, as well as appearing of inhomogeneity of platic glide and lattice rotation. These are discussed by calculating stress field near triple junction.更多还原