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Title: Outstanding radiation resistance of tungsten-based high-entropy alloys

Abstract

A body-centered cubic W-based refractory high entropy alloy with outstanding radiation resistance has been developed. The alloy was grown as thin films showing a bimodal grain size distribution in the nanocrystalline and ultrafine regimes and a unique 4-nm lamella-like structure revealed by atom probe tomography (APT). Transmission electron microscopy (TEM) and x-ray diffraction show certain black spots appearing after thermal annealing at elevated temperatures. TEM and APT analysis correlated the black spots with second-phase particles rich in Cr and V. No sign of irradiation-created dislocation loops, even after 8 dpa, was observed. Furthermore, nanomechanical testing shows a large hardness of 14 GPa in the as-deposited samples, with near negligible irradiation hardening. Theoretical modeling combining ab initio and Monte Carlo techniques predicts the formation of Cr- and V-rich second-phase particles and points at equal mobilities of point defects as the origin of the exceptional radiation tolerance.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Warsaw Univ. of Technology, Warsaw (Poland)
  5. United Kingdom Atomic Energy Authority, Oxfordshire (United Kingdom)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21). Scientific Discovery through Advanced Computing (SciDAC); European Regional Development Fund (ERDF); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1523376
Alternate Identifier(s):
OSTI ID: 1544679
Report Number(s):
LA-UR-18-27481
Journal ID: ISSN 2375-2548; 152671
Grant/Contract Number:  
AC02-06CH11357; 89233218CNA000001
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

El-Atwani, O., Li, Nan, Li, Meimei, Devaraj, Arun, Baldwin, J. K. S., Schneider, Matthew M., Sobieraj, Damian, Wróbel, Jan S., Nguyen-Manh, Duc, Maloy, Stuart A., and Martinez, Enrique. Outstanding radiation resistance of tungsten-based high-entropy alloys. United States: N. p., 2019. Web. doi:10.1126/sciadv.aav2002.
El-Atwani, O., Li, Nan, Li, Meimei, Devaraj, Arun, Baldwin, J. K. S., Schneider, Matthew M., Sobieraj, Damian, Wróbel, Jan S., Nguyen-Manh, Duc, Maloy, Stuart A., & Martinez, Enrique. Outstanding radiation resistance of tungsten-based high-entropy alloys. United States. doi:10.1126/sciadv.aav2002.
El-Atwani, O., Li, Nan, Li, Meimei, Devaraj, Arun, Baldwin, J. K. S., Schneider, Matthew M., Sobieraj, Damian, Wróbel, Jan S., Nguyen-Manh, Duc, Maloy, Stuart A., and Martinez, Enrique. Fri . "Outstanding radiation resistance of tungsten-based high-entropy alloys". United States. doi:10.1126/sciadv.aav2002. https://www.osti.gov/servlets/purl/1523376.
@article{osti_1523376,
title = {Outstanding radiation resistance of tungsten-based high-entropy alloys},
author = {El-Atwani, O. and Li, Nan and Li, Meimei and Devaraj, Arun and Baldwin, J. K. S. and Schneider, Matthew M. and Sobieraj, Damian and Wróbel, Jan S. and Nguyen-Manh, Duc and Maloy, Stuart A. and Martinez, Enrique},
abstractNote = {A body-centered cubic W-based refractory high entropy alloy with outstanding radiation resistance has been developed. The alloy was grown as thin films showing a bimodal grain size distribution in the nanocrystalline and ultrafine regimes and a unique 4-nm lamella-like structure revealed by atom probe tomography (APT). Transmission electron microscopy (TEM) and x-ray diffraction show certain black spots appearing after thermal annealing at elevated temperatures. TEM and APT analysis correlated the black spots with second-phase particles rich in Cr and V. No sign of irradiation-created dislocation loops, even after 8 dpa, was observed. Furthermore, nanomechanical testing shows a large hardness of 14 GPa in the as-deposited samples, with near negligible irradiation hardening. Theoretical modeling combining ab initio and Monte Carlo techniques predicts the formation of Cr- and V-rich second-phase particles and points at equal mobilities of point defects as the origin of the exceptional radiation tolerance.},
doi = {10.1126/sciadv.aav2002},
journal = {Science Advances},
issn = {2375-2548},
number = 3,
volume = 5,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: Alloy composition. (A) Cross-sectional transmission electron microscopy (TEM) image of the HEA film showing a region where EDS line scan is performed. (B) EDS line scan concentration profiles of the elements in the HEA film. (C) Cross-sectional scanning electronmicroscopymicrographwith EDSmaps of the elemental composition on the HEA film.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.