Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures
Abstract
The strong and ductile single-phase body-centered-cubic (BCC) HfNbTaTiZr refractory high-entropy alloy (RHEA) is a potential structural material for high-temperature applications. However, the BCC phase stability in the intermediate temperature range (500–900 °C) needs to be better understood to make this alloy applicable to industry. In the present work, the phase decomposition of the HfNbTaTiZr RHEA is examined at different temperatures (500–1000 °C). Additionally, the formation of BCC Ta-Nb-rich and hexagonal-close-packed (HCP) Hf-Zr-rich precipitates are studied as a function of annealing time at 700 °C using a combination of atom probe tomography, transmission electron microscopy, and X-ray diffraction. We found that these BCC and HCP precipitates have preferred orientations with the BCC matrix.
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States)
- National Tsing Hua University, Hsinchu (Taiwan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, South Park, PA (United States)
- Illinois Institute of Technology, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States); National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE Office of Fossil Energy (FE); University of Tennessee; National Science Foundation (NSF); Ministry of Education of the People's Republic of China; Ministry of Science and Technology of the Republic of China (MOST); FE; USDOE Office of Fossil Energy and Carbon Management (FECM)
- OSTI Identifier:
- 1504430
- Alternate Identifier(s):
- OSTI ID: 1532675; OSTI ID: 1561614; OSTI ID: 1702957
- Grant/Contract Number:
- AC02-06CH11357; FE0011194; AC02-05CH11231; FE0004000; AC05-00OR22725; FE-0011194
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scripta Materialia
- Additional Journal Information:
- Journal Volume: 158; Journal Issue: C; Journal ID: ISSN 1359-6462
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; annealing; high-entropy alloys; phase decomposition
Citation Formats
Chen, S. Y., Tong, Y., Tseng, K. -K., Yeh, J. -W., Poplawsky, J. D., Wen, J. G., Gao, M. C., Kim, G., Chen, W., Ren, Y., Feng, R., Li, W. D., and Liaw, P. K. Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures. United States: N. p., 2018.
Web. doi:10.1016/j.scriptamat.2018.08.032.
Chen, S. Y., Tong, Y., Tseng, K. -K., Yeh, J. -W., Poplawsky, J. D., Wen, J. G., Gao, M. C., Kim, G., Chen, W., Ren, Y., Feng, R., Li, W. D., & Liaw, P. K. Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures. United States. https://doi.org/10.1016/j.scriptamat.2018.08.032
Chen, S. Y., Tong, Y., Tseng, K. -K., Yeh, J. -W., Poplawsky, J. D., Wen, J. G., Gao, M. C., Kim, G., Chen, W., Ren, Y., Feng, R., Li, W. D., and Liaw, P. K. Tue .
"Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures". United States. https://doi.org/10.1016/j.scriptamat.2018.08.032. https://www.osti.gov/servlets/purl/1504430.
@article{osti_1504430,
title = {Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures},
author = {Chen, S. Y. and Tong, Y. and Tseng, K. -K. and Yeh, J. -W. and Poplawsky, J. D. and Wen, J. G. and Gao, M. C. and Kim, G. and Chen, W. and Ren, Y. and Feng, R. and Li, W. D. and Liaw, P. K.},
abstractNote = {The strong and ductile single-phase body-centered-cubic (BCC) HfNbTaTiZr refractory high-entropy alloy (RHEA) is a potential structural material for high-temperature applications. However, the BCC phase stability in the intermediate temperature range (500–900 °C) needs to be better understood to make this alloy applicable to industry. In the present work, the phase decomposition of the HfNbTaTiZr RHEA is examined at different temperatures (500–1000 °C). Additionally, the formation of BCC Ta-Nb-rich and hexagonal-close-packed (HCP) Hf-Zr-rich precipitates are studied as a function of annealing time at 700 °C using a combination of atom probe tomography, transmission electron microscopy, and X-ray diffraction. We found that these BCC and HCP precipitates have preferred orientations with the BCC matrix.},
doi = {10.1016/j.scriptamat.2018.08.032},
journal = {Scripta Materialia},
number = C,
volume = 158,
place = {United States},
year = {Tue Aug 28 00:00:00 EDT 2018},
month = {Tue Aug 28 00:00:00 EDT 2018}
}
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