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Title: Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys

Abstract

A pressure-induced phase transition from the fcc to a hexagonal close-packed (hcp) structure was found in NiCoCrFe solid solution alloy starting at 13.5 GPa. The phase transition is very sluggish and the transition did not complete at ~40 GPa. The hcp structure is quenchable to ambient pressure. Only a very small amount (<5%) of hcp phase was found in the isostructural NiCoCr ternary alloy up to the pressure of 45 GPa and no obvious hcp phase was found in NiCoCrFePd system till to 74 GPa. Ab initio Gibbs free energy calculations indicated the energy differences between the fcc and the hcp phases for the three alloys are very small, but they are sensitive to temperature. The critical transition pressure in NiCoCrFe varies from ~1 GPa at room temperature to ~6 GPa at 500 K.

Authors:
; ; ; ; ; ; ; ;  [1]
  1. Tennessee-K
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1338997
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 1; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, F. X., Zhao, Shijun, Jin, Ke, Bei, H., Popov, D., Park, Changyong, Neuefeind, J. C., Weber, W. J., Zhang, Yanwen, ORNL), and CIW). Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys. United States: N. p., 2017. Web. doi:10.1063/1.4973627.
Zhang, F. X., Zhao, Shijun, Jin, Ke, Bei, H., Popov, D., Park, Changyong, Neuefeind, J. C., Weber, W. J., Zhang, Yanwen, ORNL), & CIW). Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys. United States. doi:10.1063/1.4973627.
Zhang, F. X., Zhao, Shijun, Jin, Ke, Bei, H., Popov, D., Park, Changyong, Neuefeind, J. C., Weber, W. J., Zhang, Yanwen, ORNL), and CIW). Wed . "Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys". United States. doi:10.1063/1.4973627.
@article{osti_1338997,
title = {Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys},
author = {Zhang, F. X. and Zhao, Shijun and Jin, Ke and Bei, H. and Popov, D. and Park, Changyong and Neuefeind, J. C. and Weber, W. J. and Zhang, Yanwen and ORNL) and CIW)},
abstractNote = {A pressure-induced phase transition from the fcc to a hexagonal close-packed (hcp) structure was found in NiCoCrFe solid solution alloy starting at 13.5 GPa. The phase transition is very sluggish and the transition did not complete at ~40 GPa. The hcp structure is quenchable to ambient pressure. Only a very small amount (<5%) of hcp phase was found in the isostructural NiCoCr ternary alloy up to the pressure of 45 GPa and no obvious hcp phase was found in NiCoCrFePd system till to 74 GPa. Ab initio Gibbs free energy calculations indicated the energy differences between the fcc and the hcp phases for the three alloys are very small, but they are sensitive to temperature. The critical transition pressure in NiCoCrFe varies from ~1 GPa at room temperature to ~6 GPa at 500 K.},
doi = {10.1063/1.4973627},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 1,
volume = 110,
place = {United States},
year = {2017},
month = {1}
}

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    Works referencing / citing this record:

    Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy
    journal, May 2019