Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling
Abstract
Long-term stability of high entropy alloys (HEAs) is a critical consideration for the design and practical application of HEAs. It has long been assumed that many HEAs are a kinetically-stabilized metastable structure, and recent experiments have confirmed this hypothesis by observing HEA ecomposition after long-termequilibration. In the presentwork,we demonstrate the use of the CALculation of PHAse Diagrams (CALPHAD) approach to predict HEA stability and processing parameters, comparing experimental long-term annealing observations to CALPHAD phase diagrams from a commercially-available HEA database. As a result, we find good agreement between single- and multi-phase predictions and experiments.
- Authors:
-
[1];
- QuesTek Innovations LLC, Evanston, IL (United States)
- The Univ. of Tennessee, Knoxville, TN (United States)
- QuesTek Innovations LLC, Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States)
- Publication Date:
- Research Org.:
- QuesTek Innovations LLC, Evanston, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1405304
- Alternate Identifier(s):
- OSTI ID: 1549411
- Grant/Contract Number:
- SC0013220
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scripta Materialia
- Additional Journal Information:
- Journal Volume: 146; Journal Issue: C; Journal ID: ISSN 1359-6462
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CALPHAD; Phase diagram; Metal and alloys; Microstructure
Citation Formats
Saal, James E., Berglund, Ida S., Sebastian, Jason T., Liaw, Peter K., and Olson, Greg B. Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling. United States: N. p., 2017.
Web. doi:10.1016/j.scriptamat.2017.10.027.
Saal, James E., Berglund, Ida S., Sebastian, Jason T., Liaw, Peter K., & Olson, Greg B. Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling. United States. https://doi.org/10.1016/j.scriptamat.2017.10.027
Saal, James E., Berglund, Ida S., Sebastian, Jason T., Liaw, Peter K., and Olson, Greg B. Sun .
"Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling". United States. https://doi.org/10.1016/j.scriptamat.2017.10.027. https://www.osti.gov/servlets/purl/1405304.
@article{osti_1405304,
title = {Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling},
author = {Saal, James E. and Berglund, Ida S. and Sebastian, Jason T. and Liaw, Peter K. and Olson, Greg B.},
abstractNote = {Long-term stability of high entropy alloys (HEAs) is a critical consideration for the design and practical application of HEAs. It has long been assumed that many HEAs are a kinetically-stabilized metastable structure, and recent experiments have confirmed this hypothesis by observing HEA ecomposition after long-termequilibration. In the presentwork,we demonstrate the use of the CALculation of PHAse Diagrams (CALPHAD) approach to predict HEA stability and processing parameters, comparing experimental long-term annealing observations to CALPHAD phase diagrams from a commercially-available HEA database. As a result, we find good agreement between single- and multi-phase predictions and experiments.},
doi = {10.1016/j.scriptamat.2017.10.027},
journal = {Scripta Materialia},
number = C,
volume = 146,
place = {United States},
year = {Sun Oct 29 00:00:00 EDT 2017},
month = {Sun Oct 29 00:00:00 EDT 2017}
}
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