Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys
Abstract
The concept of high entropy alloy (HEA) opens a vast unexplored composition range for alloy design. As a well-studied system, Al-Co-Cr-Fe-Ni has attracted tremendous amount of attention to develop new-generation low-density structural materials for automobile and aerospace applications. In spite of intensive investigations in the past few years, the phase stability within this HEA system is still poorly understood and needs to be clarified, which poses obstacles to the discovery of promising Al-Co-Cr-Fe-Ni HEAs. In the present work, the CALPHAD approach is employed to understand the phase stability and explore the phase transformation within the Al-Co-Cr-Fe-Ni system. As a result, the phase-stability mapping coupled with density contours is then constructed within the composition - temperature space, which provides useful guidelines for the design of low-density Al-Co-Cr-Fe-Ni HEAs with desirable properties.
- Authors:
-
- CompuTherm LLC, Middleton, WI (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- National Energy Technology Lab. (NETL), Albany, OR (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1287040
- Alternate Identifier(s):
- OSTI ID: 1359529
- Grant/Contract Number:
- AC05-00OR22725; FE-0008855; FE-0024054
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials & Design
- Additional Journal Information:
- Journal Volume: 109; Journal Issue: C; Journal ID: ISSN 0264-1275
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; high-entropy alloy; phase stability; CALPHAD; phase diagram; atom probe tomography (APT)
Citation Formats
Zhang, Chuan, Zhang, Fan, Diao, Haoyan, Gao, Michael C., Tang, Zhi, Poplawsky, Jonathan D., and Liaw, Peter K. Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys. United States: N. p., 2016.
Web. doi:10.1016/j.matdes.2016.07.073.
Zhang, Chuan, Zhang, Fan, Diao, Haoyan, Gao, Michael C., Tang, Zhi, Poplawsky, Jonathan D., & Liaw, Peter K. Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys. United States. https://doi.org/10.1016/j.matdes.2016.07.073
Zhang, Chuan, Zhang, Fan, Diao, Haoyan, Gao, Michael C., Tang, Zhi, Poplawsky, Jonathan D., and Liaw, Peter K. Tue .
"Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys". United States. https://doi.org/10.1016/j.matdes.2016.07.073. https://www.osti.gov/servlets/purl/1287040.
@article{osti_1287040,
title = {Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys},
author = {Zhang, Chuan and Zhang, Fan and Diao, Haoyan and Gao, Michael C. and Tang, Zhi and Poplawsky, Jonathan D. and Liaw, Peter K.},
abstractNote = {The concept of high entropy alloy (HEA) opens a vast unexplored composition range for alloy design. As a well-studied system, Al-Co-Cr-Fe-Ni has attracted tremendous amount of attention to develop new-generation low-density structural materials for automobile and aerospace applications. In spite of intensive investigations in the past few years, the phase stability within this HEA system is still poorly understood and needs to be clarified, which poses obstacles to the discovery of promising Al-Co-Cr-Fe-Ni HEAs. In the present work, the CALPHAD approach is employed to understand the phase stability and explore the phase transformation within the Al-Co-Cr-Fe-Ni system. As a result, the phase-stability mapping coupled with density contours is then constructed within the composition - temperature space, which provides useful guidelines for the design of low-density Al-Co-Cr-Fe-Ni HEAs with desirable properties.},
doi = {10.1016/j.matdes.2016.07.073},
journal = {Materials & Design},
number = C,
volume = 109,
place = {United States},
year = {Tue Jul 19 00:00:00 EDT 2016},
month = {Tue Jul 19 00:00:00 EDT 2016}
}
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