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Cryogenic temperatures promote the pressure-induced polymorphic transition in CoCrFeMnNi high entropy alloy

Hörnqvist Colliander, Magnus ; Haase, Dörthe LU ; Glazyrin, Konstantin ; Edgren, Aina ; Wang, Pan ; Guthrie, Malcolm LU and Guo, Sheng (2024) In Journal of Applied Physics 136(11).
Abstract

Pressure-induced polymorphism has recently been demonstrated in several high entropy alloys. This offers a new window into the much-debated issue of phase selection and stability in these systems. Here, we examine the effect of cryogenic temperatures on the pressure-induced transition from face centered cubic to hexagonal close-packed structures of the prototype CoCrFeMnNi (Cantor) alloy. We observe a reduction in the critical pressure for the onset of the polymorphic transition as the temperature decreases, confirming the progressive stabilization of the hexagonal phase with decreasing temperature previously predicted by ab initio calculations accounting for magnetic interactions. We argue that in situ high-pressure experiments at... (More)

Pressure-induced polymorphism has recently been demonstrated in several high entropy alloys. This offers a new window into the much-debated issue of phase selection and stability in these systems. Here, we examine the effect of cryogenic temperatures on the pressure-induced transition from face centered cubic to hexagonal close-packed structures of the prototype CoCrFeMnNi (Cantor) alloy. We observe a reduction in the critical pressure for the onset of the polymorphic transition as the temperature decreases, confirming the progressive stabilization of the hexagonal phase with decreasing temperature previously predicted by ab initio calculations accounting for magnetic interactions. We argue that in situ high-pressure experiments at cryogenic temperatures, which suppress time-dependent transformation triggered at higher temperatures, present a unique opportunity to significantly improve our understanding of these complex alloys.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Physics
volume
136
issue
11
article number
115101
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85205146786
ISSN
0021-8979
DOI
10.1063/5.0220107
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 Author(s).
id
fc680384-d9db-4a8c-829a-67677a8cdcb6
date added to LUP
2024-12-18 11:57:43
date last changed
2025-04-04 14:50:41
@article{fc680384-d9db-4a8c-829a-67677a8cdcb6,
  abstract     = {{<p>Pressure-induced polymorphism has recently been demonstrated in several high entropy alloys. This offers a new window into the much-debated issue of phase selection and stability in these systems. Here, we examine the effect of cryogenic temperatures on the pressure-induced transition from face centered cubic to hexagonal close-packed structures of the prototype CoCrFeMnNi (Cantor) alloy. We observe a reduction in the critical pressure for the onset of the polymorphic transition as the temperature decreases, confirming the progressive stabilization of the hexagonal phase with decreasing temperature previously predicted by ab initio calculations accounting for magnetic interactions. We argue that in situ high-pressure experiments at cryogenic temperatures, which suppress time-dependent transformation triggered at higher temperatures, present a unique opportunity to significantly improve our understanding of these complex alloys.</p>}},
  author       = {{Hörnqvist Colliander, Magnus and Haase, Dörthe and Glazyrin, Konstantin and Edgren, Aina and Wang, Pan and Guthrie, Malcolm and Guo, Sheng}},
  issn         = {{0021-8979}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{11}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Journal of Applied Physics}},
  title        = {{Cryogenic temperatures promote the pressure-induced polymorphic transition in CoCrFeMnNi high entropy alloy}},
  url          = {{http://dx.doi.org/10.1063/5.0220107}},
  doi          = {{10.1063/5.0220107}},
  volume       = {{136}},
  year         = {{2024}},
}