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

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4973627· OSTI ID:1338551
 [1];  [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Division of Materials Science and Technology
  2. Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., High Pressure Collaborative Access Team (HPCAT)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Division of Materials Science and Technology; Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering

In this research, pressure-induced phase transition from the fcc to a hexagonal close-packed (hcp) structure wasfound 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. Finally, the critical transition pressure in NiCoCrFe varies from 1 GPa at room temperature to 6 GPa at 500 K.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; NA0001974; FG02-99ER45775; AC02-06CH11357
OSTI ID:
1338551
Journal Information:
Applied Physics Letters, Vol. 110, Issue 1; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

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Cited By (17)

Twinning in metastable high-entropy alloys journal June 2018
First-principles investigation of the micromechanical properties of fcc-hcp polymorphic high-entropy alloys journal July 2018
Pressure-induced tuning of lattice distortion in a high-entropy oxide journal September 2019
Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy journal May 2019
A high-entropy B 4 (HfMo 2 TaTi)C and SiC ceramic composite journal January 2019
Effects of non-hydrostaticity and grain size on the pressure-induced phase transition of the CoCrFeMnNi high-entropy alloy journal September 2018
Phase transformations of Al-bearing high-entropy alloys Al x CoCrFeNi (x = 0, 0.1, 0.3, 0.75, 1.5) at high pressure journal March 2019
Tuning to more compressible phase in TiZrHfNb high entropy alloy by pressure journal January 2020
Elastic properties of face-centered cubic, body-centered cubic and hexagonal high entropy alloys by MaxEnt approach journal July 2018
Enhanced electromagnetic wave absorption of Ni–C core-shell nanoparticles by HCP-Ni phase journal August 2018
Metastability in high-entropy alloys: A review journal September 2018
Lattice Distortion and Phase Stability of Pd-Doped NiCoFeCr Solid-Solution Alloys journal November 2018
High-Pressure Induced Phase Transitions in High-Entropy Alloys: A Review journal March 2019
A Review of Multi-Scale Computational Modeling Tools for Predicting Structures and Properties of Multi-Principal Element Alloys journal February 2019
Applications of High-Pressure Technology for High-Entropy Alloys: A Review journal August 2019
Pressure-induced tuning of lattice distortion in a high-entropy oxide text January 2019
Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy text January 2019