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Title: Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys

Abstract

A combined experimental and computational evaluation of damage accumulation in ion-irradiated Ni, NiFe, and NiFeCoCr is presented. Furthermore, a suppressed damage accumulation, at early stages (low-fluence irradiation), is revealed in NiFeCoCr, with a linear dependence as a function of ion fluence, in sharp contrast with Ni and NiFe. This effect, observed at 16 K, is attributed to the complex energy landscape in these alloys that limits defect mobility and therefore enhances defect interaction and recombination. Our results, together with previous room-temperature and high-temperature investigations, suggest "self-healing" as an intrinsic property of complex alloys that is not a thermally activated process.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Fredrich Schiller Univ. of Jena (Germany). Inst. of Solid State Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1414689
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 2; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SP-CSAs; ion irradiation; RBS/C; ab initio calculations

Citation Formats

Velişa, G., Wendler, E., Zhao, S., Jin, K., Bei, H., Weber, W. J., and Zhang, Y. Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys. United States: N. p., 2017. Web. doi:10.1080/21663831.2017.1410863.
Velişa, G., Wendler, E., Zhao, S., Jin, K., Bei, H., Weber, W. J., & Zhang, Y. Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys. United States. doi:10.1080/21663831.2017.1410863.
Velişa, G., Wendler, E., Zhao, S., Jin, K., Bei, H., Weber, W. J., and Zhang, Y. Sun . "Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys". United States. doi:10.1080/21663831.2017.1410863. https://www.osti.gov/servlets/purl/1414689.
@article{osti_1414689,
title = {Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys},
author = {Velişa, G. and Wendler, E. and Zhao, S. and Jin, K. and Bei, H. and Weber, W. J. and Zhang, Y.},
abstractNote = {A combined experimental and computational evaluation of damage accumulation in ion-irradiated Ni, NiFe, and NiFeCoCr is presented. Furthermore, a suppressed damage accumulation, at early stages (low-fluence irradiation), is revealed in NiFeCoCr, with a linear dependence as a function of ion fluence, in sharp contrast with Ni and NiFe. This effect, observed at 16 K, is attributed to the complex energy landscape in these alloys that limits defect mobility and therefore enhances defect interaction and recombination. Our results, together with previous room-temperature and high-temperature investigations, suggest "self-healing" as an intrinsic property of complex alloys that is not a thermally activated process.},
doi = {10.1080/21663831.2017.1410863},
journal = {Materials Research Letters},
number = 2,
volume = 6,
place = {United States},
year = {Sun Dec 17 00:00:00 EST 2017},
month = {Sun Dec 17 00:00:00 EST 2017}
}

Journal Article:
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