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Title: Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys

Abstract

Performance enhancement of structural materials in extreme radiation environments has been activelyinvestigated for many decades. Traditional alloys, such as steel, brass and aluminum alloys, normallycontain one or two principal element(s) with a low concentration of other elements. While these existin either a mixture of metallic phases (multiple phases) or in a solid solution (single phase), limited orlocalized chemical disorder is a common characteristic of the main matrix. Fundamentally different fromtraditional alloys, recently developed single-phase concentrated solid-solutio n alloys (CSAs) contain mul-tiple elemental species in equiatomic or high concentrations with different elements randomly arrangedon a crystalline lattice. Due to the lack of ordered elemental arrangement in these CSAs, they exhibit sig-nificant chemical disorder and unique site-to-site lattice distortion. While it is well recognized intraditional alloys that minor additions lead to enhanced radiation resistance, it remains unclear inCSAs how atomic-level heterogeneity affects defect formation, damage accumulation, and microstruc-tural evolution. These knowledge gaps have acted as roadblocks to the development of future-generation energy technology. CSAs with a simple crystal structure, but complex chemical disorder,are unique systems that allow us, through replacing principal alloying elements and modifying concen-trations, to study how compositional complexity influences defect dynamics, and to bridge the knowl-edge gaps through understandingmore » intricate electronic- and atomic-level interactions, mass and energytransfer processes, and radiation resistance performance. Recent advances in defect dynamics and irradi-ation performance of CSAs are reviewed, intrinsic chemical effects on radiation performance arediscussed, and direction for future studies is suggested.« less

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [4];  [5]
  1. Oak Ridge National Laboratory. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; The University of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
  2. Oak Ridge National Laboratory. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. The University of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering; Oak Ridge National Laboratory. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  4. University of Helsinki (Finland). Department of Physics
  5. University of Helsinki (Finland). Department of Physics, Helsinki Institute of Physics;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Lawrence Berkeley National Laboratory, Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC).
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1463271
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Current Opinion in Solid State and Materials Science
Additional Journal Information:
Journal Volume: 21; Journal Issue: 5; Journal ID: ISSN 1359-0286
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Yanwen, Zhao, Shijun, Weber, William J., Nordlund, Kai, Granberg, Fredric, and Djurabekova, Flyura. Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys. United States: N. p., 2017. Web. doi:10.1016/j.cossms.2017.02.002.
Zhang, Yanwen, Zhao, Shijun, Weber, William J., Nordlund, Kai, Granberg, Fredric, & Djurabekova, Flyura. Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys. United States. doi:10.1016/j.cossms.2017.02.002.
Zhang, Yanwen, Zhao, Shijun, Weber, William J., Nordlund, Kai, Granberg, Fredric, and Djurabekova, Flyura. Sun . "Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys". United States. doi:10.1016/j.cossms.2017.02.002.
@article{osti_1463271,
title = {Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys},
author = {Zhang, Yanwen and Zhao, Shijun and Weber, William J. and Nordlund, Kai and Granberg, Fredric and Djurabekova, Flyura},
abstractNote = {Performance enhancement of structural materials in extreme radiation environments has been activelyinvestigated for many decades. Traditional alloys, such as steel, brass and aluminum alloys, normallycontain one or two principal element(s) with a low concentration of other elements. While these existin either a mixture of metallic phases (multiple phases) or in a solid solution (single phase), limited orlocalized chemical disorder is a common characteristic of the main matrix. Fundamentally different fromtraditional alloys, recently developed single-phase concentrated solid-solutio n alloys (CSAs) contain mul-tiple elemental species in equiatomic or high concentrations with different elements randomly arrangedon a crystalline lattice. Due to the lack of ordered elemental arrangement in these CSAs, they exhibit sig-nificant chemical disorder and unique site-to-site lattice distortion. While it is well recognized intraditional alloys that minor additions lead to enhanced radiation resistance, it remains unclear inCSAs how atomic-level heterogeneity affects defect formation, damage accumulation, and microstruc-tural evolution. These knowledge gaps have acted as roadblocks to the development of future-generation energy technology. CSAs with a simple crystal structure, but complex chemical disorder,are unique systems that allow us, through replacing principal alloying elements and modifying concen-trations, to study how compositional complexity influences defect dynamics, and to bridge the knowl-edge gaps through understanding intricate electronic- and atomic-level interactions, mass and energytransfer processes, and radiation resistance performance. Recent advances in defect dynamics and irradi-ation performance of CSAs are reviewed, intrinsic chemical effects on radiation performance arediscussed, and direction for future studies is suggested.},
doi = {10.1016/j.cossms.2017.02.002},
journal = {Current Opinion in Solid State and Materials Science},
issn = {1359-0286},
number = 5,
volume = 21,
place = {United States},
year = {2017},
month = {10}
}

Works referencing / citing this record:

First-principles study of He behavior in a NiCoFeCr concentrated solid–solution alloy
journal, February 2019