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:
-
[2];
- Univ. of Science and Technology Beijing, Beijing (China); The Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- The Univ. of Tennessee, Knoxville, TN (United States)
- CompuTherm LLC, Middleton, WI (United States)
- Univ. of Science and Technology Beijing, Beijing (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (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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