Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures

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.

doi:10.1016/j.scriptamat.2018.08.032

Phase transformations of HfNbTaTiZr high-entropy alloy at intermediate temperatures

Journal Article · Tue Aug 28 00:00:00 EDT 2018 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2018.08.032· OSTI ID:1504430

Chen, S. Y. ^[1]; Tong, Y. ^[1]; Tseng, K. -K. ^[2]; Yeh, J. -W. ^[2]; Poplawsky, J. D. ^[3]; Wen, J. G. ^[4]; Gao, M. C. ^[5]; Kim, G. ^[6]; Chen, W. ^[6]; Ren, Y. ^[4]; Feng, R. ^[1]; Li, W. D. ^[1]; Liaw, P. K. ^[1]

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)

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 degrees C) needs to be better understood to make this alloy applicable to industry. Here, the phase decomposition of the HfNbTaTiZr RHEA is examined at different temperatures (500-1000 degrees 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 degrees C using a combination of atom probe tomography, transmission electron microscopy, and X-ray diffraction. In conclusion, we found that these BCC and HCP precipitates have preferred orientations with the BCC matrix.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). 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)

Grant/Contract Number:: AC02-06CH11357; FE0011194; AC02-05CH11231; FE0004000

OSTI ID:: 1504430

Alternate ID(s):: OSTI ID: 1702957
OSTI ID: 1532675
OSTI ID: 1561614
OSTI ID: 22819327

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: C Vol. 158; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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On the Room-Temperature Mechanical Properties of an Ion-Irradiated TiZrNbHfTa Refractory High Entropy Alloy Moschetti, Michael; Xu, Alan; Schuh, Benjamin JOM, Vol. 72, Issue 1 https://doi.org/10.1007/s11837-019-03861-6	journal	November 2019
Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy Chen, S. Y.; Wang, L.; Li, W. D. Materials Research Letters, Vol. 7, Issue 12 https://doi.org/10.1080/21663831.2019.1658233	journal	August 2019
Additive Manufacturing of High-Entropy Alloys: A Review Chen, Shuying; Tong, Yang; Liaw, Peter Entropy, Vol. 20, Issue 12 https://doi.org/10.3390/e20120937	journal	December 2018
Microstructure and Room Temperature Mechanical Properties of Different 3 and 4 Element Medium Entropy Alloys from HfNbTaTiZr System Zýka, Jiří; Málek, Jaroslav; Veselý, Jaroslav Entropy, Vol. 21, Issue 2 https://doi.org/10.3390/e21020114	journal	January 2019
Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy Ma, Yueli; Wu, Shiwei; Jia, Yuefei Metals, Vol. 9, Issue 5 https://doi.org/10.3390/met9050485	journal	April 2019
Microstructure and Mechanical Properties of Sintered and Heat-Treated HfNbTaTiZr High Entropy Alloy Málek, Jaroslav; Zýka, Jiří; Lukáč, František Metals, Vol. 9, Issue 12 https://doi.org/10.3390/met9121324	journal	December 2019

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