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Title: Tunable Chemical Disorder in Concentrated Alloys: Defect Physics and Radiation Performance

Abstract

The development of advanced structural alloys with performance meeting the requirements of extreme environments in nuclear reactors has been long pursued. In the long history of alloy development, the search for metallic alloys with improved radiation tolerance or increased structural strength has relied on either incorporating alloying elements at low concentrations to synthesize so-called dilute alloys or incorporating nanoscale features to mitigate defects. In contrast to traditional approaches, recent success in synthesizing multicomponent concentrated solid-solution alloys (CSAs), including medium-entropy and high-entropy alloys, has vastly expanded the compositional space for new alloy discovery. Their wide variety of elemental diversity enables tunable chemical disorder and sets CSAs apart from traditional dilute alloys. The tunable electronic structure critically lowers the effectiveness of energy dissipation via the electronic subsystem. The tunable chemical complexity also modifies the scattering mechanisms in the atomic subsystem that control energy transport through phonons. The level of chemical disorder depends substantively on the specific alloying elements, rather than the number of alloying elements, as the disorder does not monotonically increase with a higher number of alloying elements. To go beyond our knowledge based on conventional alloys and take advantage of property enhancement by tuning chemical disorder, this review highlights synergisticmore » effects involving valence electrons and atomic-level and nanoscale inhomogeneity in CSAs composed of multiple transition metals. Understanding of the energy dissipation pathways, deformation tolerance, and structural stability of CSAs can proceed by exploiting the equilibrium and non-equilibrium defect processes at the electronic and atomic levels, with or without microstructural inhomogeneities at multiple length scales. Knowledge of tunable chemical disorder in CSAs may advance the understanding of the substantial modifications in element-specific alloy properties that effectively mitigate radiation damage and control a material’s response in extreme environments, as well as overcome strength–ductility trade-offs and provide overarching design strategies for structural alloys.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States, Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
  2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
  3. Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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)
OSTI Identifier:
1827419
Alternate Identifier(s):
OSTI ID: 1839528; OSTI ID: 1872864
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Chemical Reviews
Additional Journal Information:
Journal Name: Chemical Reviews Journal Volume: 122 Journal Issue: 1; Journal ID: ISSN 0009-2665
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Elements; Diseases and disorders; Alloying; Alloys; Electrical energy

Citation Formats

Zhang, Yanwen, Osetsky, Yuri N., and Weber, William J. Tunable Chemical Disorder in Concentrated Alloys: Defect Physics and Radiation Performance. United States: N. p., 2021. Web. doi:10.1021/acs.chemrev.1c00387.
Zhang, Yanwen, Osetsky, Yuri N., & Weber, William J. Tunable Chemical Disorder in Concentrated Alloys: Defect Physics and Radiation Performance. United States. https://doi.org/10.1021/acs.chemrev.1c00387
Zhang, Yanwen, Osetsky, Yuri N., and Weber, William J. Mon . "Tunable Chemical Disorder in Concentrated Alloys: Defect Physics and Radiation Performance". United States. https://doi.org/10.1021/acs.chemrev.1c00387.
@article{osti_1827419,
title = {Tunable Chemical Disorder in Concentrated Alloys: Defect Physics and Radiation Performance},
author = {Zhang, Yanwen and Osetsky, Yuri N. and Weber, William J.},
abstractNote = {The development of advanced structural alloys with performance meeting the requirements of extreme environments in nuclear reactors has been long pursued. In the long history of alloy development, the search for metallic alloys with improved radiation tolerance or increased structural strength has relied on either incorporating alloying elements at low concentrations to synthesize so-called dilute alloys or incorporating nanoscale features to mitigate defects. In contrast to traditional approaches, recent success in synthesizing multicomponent concentrated solid-solution alloys (CSAs), including medium-entropy and high-entropy alloys, has vastly expanded the compositional space for new alloy discovery. Their wide variety of elemental diversity enables tunable chemical disorder and sets CSAs apart from traditional dilute alloys. The tunable electronic structure critically lowers the effectiveness of energy dissipation via the electronic subsystem. The tunable chemical complexity also modifies the scattering mechanisms in the atomic subsystem that control energy transport through phonons. The level of chemical disorder depends substantively on the specific alloying elements, rather than the number of alloying elements, as the disorder does not monotonically increase with a higher number of alloying elements. To go beyond our knowledge based on conventional alloys and take advantage of property enhancement by tuning chemical disorder, this review highlights synergistic effects involving valence electrons and atomic-level and nanoscale inhomogeneity in CSAs composed of multiple transition metals. Understanding of the energy dissipation pathways, deformation tolerance, and structural stability of CSAs can proceed by exploiting the equilibrium and non-equilibrium defect processes at the electronic and atomic levels, with or without microstructural inhomogeneities at multiple length scales. Knowledge of tunable chemical disorder in CSAs may advance the understanding of the substantial modifications in element-specific alloy properties that effectively mitigate radiation damage and control a material’s response in extreme environments, as well as overcome strength–ductility trade-offs and provide overarching design strategies for structural alloys.},
doi = {10.1021/acs.chemrev.1c00387},
journal = {Chemical Reviews},
number = 1,
volume = 122,
place = {United States},
year = {Mon Oct 25 00:00:00 EDT 2021},
month = {Mon Oct 25 00:00:00 EDT 2021}
}

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Irradiation‐Induced Extremes Create Hierarchical Face‐/Body‐Centered‐Cubic Phases in Nanostructured High Entropy Alloys
journal, August 2020


An in situ experimental study of grain growth in a nanocrystalline Fe91Ni8Zr1 alloy
journal, November 2012

  • Kotan, Hasan; Darling, Kris A.; Saber, Mostafa
  • Journal of Materials Science, Vol. 48, Issue 5
  • DOI: 10.1007/s10853-012-7002-1

Diffusion-mediated chemical concentration variation and void evolution in ion-irradiated NiCoFeCr high-entropy alloy
journal, January 2021


Effects of temperature on the irradiation responses of Al0.1CoCrFeNi high entropy alloy
journal, February 2018


In-situ TEM studies of 150 keV W+ ion irradiated W and W-alloys: Damage production and microstructural evolution
journal, June 2016


Atomic-level heterogeneity and defect dynamics in concentrated solid-solution alloys
journal, October 2017

  • Zhang, Yanwen; Zhao, Shijun; Weber, William J.
  • Current Opinion in Solid State and Materials Science, Vol. 21, Issue 5
  • DOI: 10.1016/j.cossms.2017.02.002

Analysis of occupational and displacive disorder using the atomic pair distribution function: a systematic investigation
journal, January 2000