In situ study on heavy ion irradiation induced microstructure evolution in single crystal Cu with nanovoids at elevated temperature. (December 2022)

• Record Type: Journal Article
• Authors: Niu, Tongjun; Rayaprolu, Sreekar; Shang, Zhongxia; Sun, Tianyi; Fan, Cuncai; Zhang, Yifan; Shen, Chao; Nasim, Md; Chen, Wei-ying; Li, Meimei; Xue, Yexiang; Wang, Haiyan; El-Azab, Anter; Zhang, Xinghang
• Is Part Of: Materials today communications. Volume 33(2022)
• Publication Date: 2022-12
• Subjects: In situ radiation -- Nanovoids -- Thin films -- Phase field simulations -- Radiation damage; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.104418
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: Understanding the response of nanovoids to irradiation damage advances our capability to design radiation tolerant materials. Recent in situ studies reveal the shrinkage of hexagon-shaped nanovoids in (110) textured Cu. However, the evolution of voids with irregular geometries under irradiation is less well understood. Here, in situ Kr ion irradiation was performed at 100 °C on single-crystal Cu (112) that possesses nanovoids with high aspect ratio. In situ studies show these elongated voids fragment into smaller voids and shrink gradually with increasing dose. Phase field simulations confirm that fragmentation of the void is governed by the competing kinetics between atoms diffusing toward and away from the elongated nanovoid. Post irradiation analysis reveals the formation of high-density defect clusters. Graphical Abstract: ga1