Typical characteristics for creep fracture cleavage plane of nickel-based single crystal

Typical characteristics for creep fracture cleavage plane of nickel-based single crystal were investigated through the experimental observations. The results suggest that the topological shape of cleavage planes is related to the crystal graphical orientation. The cleavage surface exhibit four-fold symmetric in [001] orientation, two-fold symmetric in [011] orientation, and triple-symmetric in [111] orientation. It is proved that the topological...