We have carried out detailed density functional theory-based Monte Carlo simulations to explore the characteristic chemical short-range order (CSRO) in TiZrHfNb, which is a representative body-centered-cubic refractory high-entropy alloy (HEA). The salient feature observed is the preference for Ti-Zr and Nb-Hf nearest-neighbor environments, which also explains the distribution pattern of O interstitials toward the formation of (Ti,Zr,O)-enriched ordered complexes. We also report certain small but noticeable changes in key material parameters due to the presence of CSROs, including elastic moduli, misfit volume, and predicted yield strength, which offer useful structure–property information for improving the design of highly concentrated HEA solid solutions.
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15 November 2021
Research Article|
November 17 2021
Chemical short-range order in body-centered-cubic TiZrHfNb high-entropy alloys
Special Collection:
Metastable High Entropy Alloys
Bozhao Zhang;
Bozhao Zhang
Center for Alloy Innovation and Design (CAID), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University
, Xi'an 710049, China
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Jun Ding
;
Jun Ding
a)
Center for Alloy Innovation and Design (CAID), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University
, Xi'an 710049, China
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Note: This paper is part of the APL Special Collection on Metastable High Entropy Alloys.
Appl. Phys. Lett. 119, 201908 (2021)
Article history
Received:
August 31 2021
Accepted:
November 01 2021
Citation
Bozhao Zhang, Jun Ding, En Ma; Chemical short-range order in body-centered-cubic TiZrHfNb high-entropy alloys. Appl. Phys. Lett. 15 November 2021; 119 (20): 201908. https://doi.org/10.1063/5.0069417
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