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Title: Cavity evolution at grain boundaries as a function of radiation damage and thermal conditions in nanocrystalline nickel

Journal Article · · Materials Research Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [5]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Northwestern Univ., Evanston, IL (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Georgia Tech CNRS, Metz (France)
  5. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  6. Northwestern Univ., Evanston, IL (United States); Tufts Univ., Medford, MA (United States)

Enhanced radiation tolerance of nanostructured metals is attributed to the high density of interfaces that can absorb radiation-induced defects. Here, cavity evolution mechanisms during cascade damage, helium implantation, and annealing of nanocrystalline nickel are characterized via in situ transmission electron microscopy (TEM). Films subjected to self-ion irradiation followed by helium implantation developed evenly distributed cavity structures, whereas films exposed in the reversed order developed cavities preferentially distributed along grain boundaries. Post-irradiation annealing and orientation mapping demonstrated uniform cavity growth in the nanocrystalline structure, and cavities spanning multiple grains. Furthermore, these mechanisms suggest limited ability to reduce swelling, despite the stability of the nanostructure.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1343266
Report Number(s):
SAND-2016-12418J; 650382
Journal Information:
Materials Research Letters, Vol. 4, Issue 2; ISSN 2166-3831
Publisher:
Taylor and FrancisCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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