Characterization of Twin Transmission Structure of High Manganese Austenitic Steel by High-Resolution Transmission Electron Microscopy

Atomic-scale twin transmission structures were clearly characterized by high-resolution transmission electron microscopy. Two different twin transmission structures are found during another variant twin "transmitting across" pre-existing twins: dislocation twin transmission structure and local crystal reorientation twin transmission structure. In addition, twin-twin interactions can induce the formation of other structures, such as double twins, stacking faults and few e-martensite, and coherent twin boundaries of two variants twins can simultaneously migrate, appearing as if a twin partly penetrates the other one.