Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters

Temesi, Ottó; Varga, Lajos K.; Li, Xiaoqing; Vitos, Levente; Chinh, Nguyen Q.

doi:10.3390/ma16062311

Open AccessArticle

Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters

by

Ottó Temesi

^1,2,

Lajos K. Varga

³,

Xiaoqing Li

⁴,

Levente Vitos

^3,4 and

Nguyen Q. Chinh

^2,*

¹

H-ION Research, Development and Innovation Ltd., Konkoly-Thege Miklos út 29-33, H-1121 Budapest, Hungary

²

Department of Materials Physics, Eötvös Loránd University, Pázmány Péter Sétány 1/A, H-1117 Budapest, Hungary

³

Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Konkoly-Thege Miklos út 29-33, H-1121 Budapest, Hungary

⁴

Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-100 44 Stockholm, Sweden

^*

Author to whom correspondence should be addressed.

Materials 2023, 16(6), 2311; https://doi.org/10.3390/ma16062311

Submission received: 1 February 2023 / Revised: 27 February 2023 / Accepted: 7 March 2023 / Published: 13 March 2023

(This article belongs to the Special Issue Advances in High Entropy Materials)

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Abstract

The relationship between the tendencies towards rigidity (measured by shear modulus, G) and hardness (measured by Vickers hardness, HV) of early transition metal (ETM)-based refractory high-entropy alloys (RHEA) and bond parameters (i.e., valence electron concentration (VEC), enthalpy of mixing (ΔH_mix)) was investigated. These bond parameters, VEC and ΔH_mix, are available from composition and tabulated data, respectively. Based on our own data (9 samples) and those available from the literatures (47 + 27 samples), it seems that for ETM-based RHEAs the G and HV characteristics have a close correlation with the bonding parameters. The room temperature value of G and HV increases with the VEC and with the negative value of ΔH_mix. Corresponding equations were deduced for the first time through multiple linear regression analysis, in order to help design the mechanical properties of ETM refractory high-entropy alloys.

Keywords: Early Transition Metals (ETM); Refractory High Entropy Alloy (RHEA); shear modulus (G); valence electron concentration (VEC); enthalpy of mixing (ΔH_mix); Vickers hardness (HV)

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MDPI and ACS Style

Temesi, O.; Varga, L.K.; Li, X.; Vitos, L.; Chinh, N.Q. Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters. Materials 2023, 16, 2311. https://doi.org/10.3390/ma16062311

AMA Style

Temesi O, Varga LK, Li X, Vitos L, Chinh NQ. Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters. Materials. 2023; 16(6):2311. https://doi.org/10.3390/ma16062311

Chicago/Turabian Style

Temesi, Ottó, Lajos K. Varga, Xiaoqing Li, Levente Vitos, and Nguyen Q. Chinh. 2023. "Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters" Materials 16, no. 6: 2311. https://doi.org/10.3390/ma16062311

APA Style

Temesi, O., Varga, L. K., Li, X., Vitos, L., & Chinh, N. Q. (2023). Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters. Materials, 16(6), 2311. https://doi.org/10.3390/ma16062311

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Estimation of Shear Modulus and Hardness of High-Entropy Alloys Made from Early Transition Metals Based on Bonding Parameters

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