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Title: Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance

Abstract

The present work investigates the homogenization effect of 1250 °C heat treatment on the AlxCoCrFeNi high-entropy alloys (HEAs). The multi-phase microstructures with chemical segregations are inevitable with the increased Al content in the alloys, which cause work function variations and localized corrosion. After heat treatment, the homogenization effect revealed by the microstructure simplification and chemical-segregation reduction leads to the decreased work function variations and the improved corrosion resistance. Furthermore, thermodynamic calculations that are reliable to predict the phase transformations of the AlxCoCrFeNi HEAs, indicates a further enhancement in corrosion resistance through annealing could be guided for many other HEAs systems.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [2];  [3];  [5]
  1. Univ. of Science and Technology Beijing, Beijing (China); The Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. The Univ. of Tennessee, Knoxville, TN (United States)
  4. CompuTherm LLC, Middleton, WI (United States)
  5. Univ. of Science and Technology Beijing, Beijing (China)
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); USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1483187
Alternate Identifier(s):
OSTI ID: 1512320
Grant/Contract Number:  
AC05-00OR22725; FE-0024054; FE-0011194; FE-0008855; 2012AA03A507; 2008AA031702; DMR-1611180
Resource Type:
Accepted Manuscript
Journal Name:
Corrosion Science
Additional Journal Information:
Journal Volume: 133; Journal Issue: C; Journal ID: ISSN 0010-938X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; alloys; AFM; segregation; pitting corrosion

Citation Formats

Shi, Yunzhu, Collins, Liam, Feng, Rui, Zhang, Chuan, Balke, Nina, Liaw, Peter K., and Yang, Bin. Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance. United States: N. p., 2018. Web. doi:10.1016/j.corsci.2018.01.030.
Shi, Yunzhu, Collins, Liam, Feng, Rui, Zhang, Chuan, Balke, Nina, Liaw, Peter K., & Yang, Bin. Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance. United States. https://doi.org/10.1016/j.corsci.2018.01.030
Shi, Yunzhu, Collins, Liam, Feng, Rui, Zhang, Chuan, Balke, Nina, Liaw, Peter K., and Yang, Bin. Fri . "Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance". United States. https://doi.org/10.1016/j.corsci.2018.01.030. https://www.osti.gov/servlets/purl/1483187.
@article{osti_1483187,
title = {Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance},
author = {Shi, Yunzhu and Collins, Liam and Feng, Rui and Zhang, Chuan and Balke, Nina and Liaw, Peter K. and Yang, Bin},
abstractNote = {The present work investigates the homogenization effect of 1250 °C heat treatment on the AlxCoCrFeNi high-entropy alloys (HEAs). The multi-phase microstructures with chemical segregations are inevitable with the increased Al content in the alloys, which cause work function variations and localized corrosion. After heat treatment, the homogenization effect revealed by the microstructure simplification and chemical-segregation reduction leads to the decreased work function variations and the improved corrosion resistance. Furthermore, thermodynamic calculations that are reliable to predict the phase transformations of the AlxCoCrFeNi HEAs, indicates a further enhancement in corrosion resistance through annealing could be guided for many other HEAs systems.},
doi = {10.1016/j.corsci.2018.01.030},
journal = {Corrosion Science},
number = C,
volume = 133,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 25 works
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