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

Abstract

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.

Authors:
 [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
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1334123
Report Number(s):
LA-UR-15-27129
Journal ID: ISSN 1047-4838
Grant/Contract Number:  
AC52-06NA25396; 1304101
Resource Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 68; Journal Issue: 1; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Material Science; Frank loop; nanovoids

Citation Formats

Chen, Youxing, Zhang, Xinghang, and Wang, Jian. Radiation Enhanced Absorption of Frank Loops by Nanovoids in Cu. United States: N. p., 2016. Web. doi:10.1007/s11837-015-1689-9.
Chen, Youxing, Zhang, Xinghang, & Wang, Jian. Radiation Enhanced Absorption of Frank Loops by Nanovoids in Cu. United States. https://doi.org/10.1007/s11837-015-1689-9
Chen, Youxing, Zhang, Xinghang, and Wang, Jian. Tue . "Radiation Enhanced Absorption of Frank Loops by Nanovoids in Cu". United States. https://doi.org/10.1007/s11837-015-1689-9. https://www.osti.gov/servlets/purl/1334123.
@article{osti_1334123,
title = {Radiation Enhanced Absorption of Frank Loops by Nanovoids in Cu},
author = {Chen, Youxing and Zhang, Xinghang and Wang, Jian},
abstractNote = {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.},
doi = {10.1007/s11837-015-1689-9},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 1,
volume = 68,
place = {United States},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}

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