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Title: In situ study on heavy ion irradiation induced microstructure evolution in single crystal Cu with nanovoids at elevated temperature

Journal Article · · Materials Today Communications
 [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [4];  [4];  [1];  [1];  [1];  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Univ. of Hong Kong (Hong Kong)
  3. Purdue Univ., West Lafayette, IN (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States)

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. In conclusion, cost irradiation analysis reveals the formation of high-density defect clusters.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; 20-4180; N00014-20-1-2043; N00014-22-1-2160; NSF-CMMI-MOM 1728419; IIS-1850243; CCF-1918327
OSTI ID:
1902961
Journal Information:
Materials Today Communications, Vol. 33; ISSN 2352-4928
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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