本团队2023级博士生施君儒等在Journal of Alloys and Compounds发表研究论文。

摘要：In this study, the evolution of dislocation and texture in pure aluminum subjected to ultrasonic vibration was characterized via both uniaxial compression tests and molecular dynamics simulations, with emphasis paid to the influence of vibration amplitude. The results implied that the ultrasonic vibration amplitude has a threshold, below which dislocation multiplication plays the dominant role, while above which the dislocation annihilation becomes dominant. Under the former condition, the dislocation density increases monotonically through deformation. Local stress concentration induced by ultrasonic vibration forces grains to rotate, thus, the average misorientation increases and the texture strength weakens. Under the later condition, the dislocation density first increases and then decreases. Stronger texture is formed to coordinate larger plastic strain induced by the higher ultrasonic vibration amplitude.