skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Lattice Distortion and Phase Stability of Pd-Doped NiCoFeCr Solid-Solution Alloys

Journal Article · · Entropy
DOI:https://doi.org/10.3390/e20120900· OSTI ID:1484109

In the present study, we have revealed that (NiCoFeCr)100–xPdx (x= 1, 3, 5, 20 atom%) high-entropy alloys (HEAs) have both local- and long-range lattice distortions by utilizing X-ray total scattering, X-ray diffraction, and extended X-ray absorption fine structure methods. The local lattice distortion determined by the lattice constant difference between the local and average structures was found to be proportional to the Pd content. A small amount of Pd-doping (1 atom%) yields long-range lattice distortion, which is demonstrated by a larger (200) lattice plane spacing than the expected value from an average structure, however, the degree of long-range lattice distortion is not sensitive to the Pd concentration. Here, the structural stability of these distorted HEAs under high-pressure was also examined. The experimental results indicate that doping with a small amount of Pd significantly enhances the stability of the fcc phase by increasing the fcc-to-hcp transformation pressure from ~13.0 GPa in NiCoFeCr to 20–26 GPa in the Pd-doped HEAs and NiCoFeCrPd maintains its fcc lattice up to 74 GPa, the maximum pressure that the current experiments have reached.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1484109
Journal Information:
Entropy, Vol. 20, Issue 12; ISSN 1099-4300
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (38)

Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations journal August 2018
ATHENA , ARTEMIS , HEPHAESTUS : data analysis for X-ray absorption spectroscopy using IFEFFIT journal June 2005
A geometric model for intrinsic residual strain and phase stability in high entropy alloys journal August 2015
Alloy Design Strategies and Future Trends in High-Entropy Alloys journal October 2013
An assessment of the lattice strain in the CrMnFeCoNi high-entropy alloy journal January 2017
Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy journal May 2017
Polymorphism in a high-entropy alloy journal June 2017
Recovery, recrystallization, grain growth and phase stability of a family of FCC-structured multi-component equiatomic solid solution alloys journal March 2014
Enhancing radiation tolerance by controlling defect mobility and migration pathways in multicomponent single-phase alloys journal December 2016
A criterion for the formation of high entropy alloys based on lattice distortion journal April 2016
Calibration and correction of distortions in two‐dimensional detector systems a) journal March 1995
Microstructural development in equiatomic multicomponent alloys journal July 2004
A novel, single phase, non-equiatomic FeMnNiCoCr high-entropy alloy with exceptional phase stability and tensile ductility journal February 2014
Local structure of NiPd solid solution alloys and its response to ion irradiation journal July 2018
Sluggish diffusion in Co–Cr–Fe–Mn–Ni high-entropy alloys journal August 2013
Evolution of local lattice distortion under irradiation in medium- and high-entropy alloys journal October 2018
Recent advances in magnetic structure determination by neutron powder diffraction journal October 1993
Tensile properties of an AlCrCuNiFeCo high-entropy alloy in as-cast and wrought conditions journal January 2012
A critical review of high entropy alloys and related concepts journal January 2017
Microstructures and properties of high-entropy alloys journal April 2014
A comparison study of local lattice distortion in Ni 80 Pd 20 binary alloy and FeCoNiCrPd high-entropy alloy journal November 2018
Microstructure and tensile behaviors of FCC Al0.3CoCrFeNi high entropy alloy journal June 2009
PDFfit2 and PDFgui: computer programs for studying nanostructure in crystals journal July 2007
Microstructures and compressive properties of multicomponent AlCoCrFeNiMox alloys journal October 2010
Phase stability of non-equiatomic CoCrFeMnNi high entropy alloys journal October 2015
Influence of chemical disorder on energy dissipation and defect evolution in concentrated solid solution alloys journal October 2015
Decomposition of the single-phase high-entropy alloy CrMnFeCoNi after prolonged anneals at intermediate temperatures journal June 2016
Pressure-induced fcc to hcp phase transition in Ni-based high entropy solid solution alloys journal January 2017
Exploration and Development of High Entropy Alloys for Structural Applications journal January 2014
Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off journal May 2016
Microstructure, thermophysical and electrical properties in AlxCoCrFeNi (0≤x≤2) high-entropy alloys journal July 2009
High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi journal May 2017
Formation of simple crystal structures in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements journal August 2004
Chemical complexity induced local structural distortion in NiCoFeMnCr high-entropy alloy journal June 2018
Local lattice distortion in NiCoCr, FeCoNiCr and FeCoNiCrMn concentrated alloys investigated by synchrotron X-ray diffraction journal October 2018
An assessment of the lattice strain in the CrMnFeCoNi high-entropy alloy text January 2016
PDFgetX3: A rapid and highly automatable program for processing powder diffraction data into total scattering pair distribution functions text January 2012
High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi text January 2016

Cited By (1)


Similar Records

Nb-H system at high pressures and temperatures
Journal Article · Fri Mar 24 00:00:00 EDT 2017 · Physical Review B · OSTI ID:1484109

Local lattice distortion mediated formation of stacking faults in Mg alloys
Journal Article · Sun Mar 24 00:00:00 EDT 2019 · Acta Materialia · OSTI ID:1484109

First-principles calculation of lattice distortions in four single phase high entropy alloys with experimental validation
Journal Article · Wed Aug 25 00:00:00 EDT 2021 · Materials & Design · OSTI ID:1484109