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Title: 9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature

Abstract

Nanotwinned metals exhibit outstanding radiation tolerance as twin boundaries effectively engage, transport and eliminate radiation-induced defects. However, radiation-induced detwinning may reduce the radiation tolerance associated with twin boundaries, especially at elevated temperatures. Here we show, via in-situ Kr ion irradiation inside a transmission electron microscope, that 3 at. % Fe in epitaxial nanotwinned Cu (Cu97Fe3) significantly improves the thermal and radiation stability of nanotwins during radiation up to 5 displacements-per-atom at 200 °C. Such enhanced stability of nanotwins is attributed to a diffuse 9R phase resulted from the dissociation of incoherent twin boundaries in nanotwinned Cu97Fe3. The mechanisms for the enhanced stability of twin boundaries in irradiated nanotwinned alloys are discussed. As a result, the stabilization of nano-twins opens up opportunity for the application of nanotwinned alloys for aggressive radiation environments.

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [3];  [1]; ORCiD logo [2];  [4];  [1];  [5]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  3. Univ. of North Carolina, Charlotte, NC (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Purdue Univ., West Lafayette, IN (United States); School of Electrical and Computer Engineering, West Lafayette, IN (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1495014
Alternate Identifier(s):
OSTI ID: 1637024
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 167; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 9R phase; detwinning; nanotwins; radiation; solute drag

Citation Formats

Fan, Cuncai, Xie, Dongyue, Li, Jin, Shang, Zhongxia, Chen, Youxing, Xue, Sichuang, Wang, Jian, Li, Meimei, El-Azab, Anter, Wang, Haiyan, and Zhang, Xinghang. 9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature. United States: N. p., 2019. Web. doi:10.1016/j.actamat.2019.01.037.
Fan, Cuncai, Xie, Dongyue, Li, Jin, Shang, Zhongxia, Chen, Youxing, Xue, Sichuang, Wang, Jian, Li, Meimei, El-Azab, Anter, Wang, Haiyan, & Zhang, Xinghang. 9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature. United States. https://doi.org/10.1016/j.actamat.2019.01.037
Fan, Cuncai, Xie, Dongyue, Li, Jin, Shang, Zhongxia, Chen, Youxing, Xue, Sichuang, Wang, Jian, Li, Meimei, El-Azab, Anter, Wang, Haiyan, and Zhang, Xinghang. Tue . "9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature". United States. https://doi.org/10.1016/j.actamat.2019.01.037. https://www.osti.gov/servlets/purl/1495014.
@article{osti_1495014,
title = {9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature},
author = {Fan, Cuncai and Xie, Dongyue and Li, Jin and Shang, Zhongxia and Chen, Youxing and Xue, Sichuang and Wang, Jian and Li, Meimei and El-Azab, Anter and Wang, Haiyan and Zhang, Xinghang},
abstractNote = {Nanotwinned metals exhibit outstanding radiation tolerance as twin boundaries effectively engage, transport and eliminate radiation-induced defects. However, radiation-induced detwinning may reduce the radiation tolerance associated with twin boundaries, especially at elevated temperatures. Here we show, via in-situ Kr ion irradiation inside a transmission electron microscope, that 3 at. % Fe in epitaxial nanotwinned Cu (Cu97Fe3) significantly improves the thermal and radiation stability of nanotwins during radiation up to 5 displacements-per-atom at 200 °C. Such enhanced stability of nanotwins is attributed to a diffuse 9R phase resulted from the dissociation of incoherent twin boundaries in nanotwinned Cu97Fe3. The mechanisms for the enhanced stability of twin boundaries in irradiated nanotwinned alloys are discussed. As a result, the stabilization of nano-twins opens up opportunity for the application of nanotwinned alloys for aggressive radiation environments.},
doi = {10.1016/j.actamat.2019.01.037},
journal = {Acta Materialia},
number = C,
volume = 167,
place = {United States},
year = {Tue Jan 29 00:00:00 EST 2019},
month = {Tue Jan 29 00:00:00 EST 2019}
}

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Cited by: 17 works
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