Tangled Dislocation Structures inside Dislocation Channels of Rapid-Cooled and Tensile-Deformed Aluminum Single Crystals

Tangled dislocation structures inside the channels of rapid-cooled and tensile deformed aluminum single crystals were investigated by using BF-STEM. Inside channels, arrays prismatic loops belonging to primary slip system, i.e., (1 1 1)[1 0 1], mainly formed. Dislocations coplanar systems such as 1)[0 1] 0] activated due internal stresses caused dislocations pile-up cleared channels. The leave elongated along edge directions behind them. Inter-dislocation-loop interactions take place especially at produce “butterfly shape” loops. Since have “sessile” junctions, they should act “obstacles” against following multiplications glides dislocations. As proceed, are stabilized grow “tangles”.