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Title: Radiation Enhanced Absorption of Frank Loops by Nanovoids in Cu

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
 [1];  [2];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). MPA-CINT
  2. Texas A&M Univ., College Station, TX (United States). Dept. of Materials Science and Engineering; Texas A&M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
  3. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering

Neutron and heavy ion irradiation generally induces voids in metallic materials, and continuous radiations typically result in void swelling and mechanical failure of the irradiated materials. Recent experiments showed that nanovoids in nanotwinned copper could act as sinks for radiation-induced Frank loops, significantly mitigating radiation damage [Y. Chen et al., Nat. Commun. 6:7036 (2015)]. In this paper, we report on structural evolution of Frank loops under cascades and address the role of nanovoids in absorbing Frank loops in detail by using molecular dynamics simulations. Results show that a stand-alone Frank loop is stable under cascades. When Frank loops are adjacent to nanovoids, the diffusion of a group of atoms from the loop into nanovoids is accomplished via the formation and propagation of dislocation loops. The loop-nanovoid interactions result in the shrinkage of the nanovoids and the Frank loops.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; 1304101
OSTI ID:
1334123
Report Number(s):
LA-UR-15-27129
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Vol. 68, Issue 1; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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