Zr diffusion in BCC refractory high entropy alloys: A case of ‘non-sluggish’ diffusion behavior

Zhang, Jingfeng; Gadelmeier, Christian; Sen, Sandipan; Wang, Rui; Zhang, Xi; Zhong, Yu; Glatzel, Uwe; Grabowski, Blazej; Wilde, Gerhard; Divinski, Sergiy V.

doi:10.1016/j.actamat.2022.117970

Cited by 50 publications

(7 citation statements)

References 72 publications

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“…The exception is the interdiffusion parameters of Ti and Zr in the HEA, which differ from the others by more than two times (139 kJ/mol for Ti and 126 kJ/mol for Zr). A similar effect was observed in a recently published paper [ 37 ], in which the diffusion of Zr in an HEA of the same composition was researched by the isotopic method, and activation energies from 134 to 172 kJ/mol were obtained. Such results remain unexplained.…”

Section: Discussionsupporting

confidence: 84%

Interdiffusion in Refractory Metal System with a BCC Lattice: Ti/TiZrHfNbTaMo

Razumovsky

Bokstein

Rodin

et al. 2023

Entropy

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Interdiffusion of the elements in a diffusion pair consisting of Ti and an equiatomic high-entropy alloy (HEA) TiZrHfNbTaMo in the temperature range of 1473–1673 K has been studied. A calculated results phase diagram of the alloy by Thermo-Calc 2021-B software as used to determine the temperature stability range of the β-phase in the alloy. Ti–HEA diffusion pairs were obtained by low = temperature welding and then diffusion annealing was carried out at temperatures of 1473, 1573, and 1673 K during 12, 9, and 6 h, respectively. The interdiffusion zone was profiled using electron probe microanalysis (EPMA). The diffusion parameters of the HEA’s elements were obtained using Hall’s method. An experimental results discussion is given.

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Section: Discussionsupporting

confidence: 84%

Interdiffusion in Refractory Metal System with a BCC Lattice: Ti/TiZrHfNbTaMo

Razumovsky

Bokstein

Rodin

et al. 2023

Entropy

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“…The composition and temperature dependencies of diffusivities for individual elements in HfNbTaTiZr have been computed using the thermodynamic TCHEA4 and mobility MOBHEA2 database. The calculated diffusion coefficient of Zr in HfNbTaTiZr at 1150°C in this work is similar to an experimental result reported recently by Zhang et al[79].…”

supporting

confidence: 92%

Tensile creep behavior of HfNbTaTiZr refractory high entropy alloy at elevated temperatures

Liu

Gadelmeier

et al. 2022

Acta Materialia

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“…This phenomenon was attributed to a lattice mis-match 𝛿 greater than 3%. [139] In addition, the diffusion coefficients and activation energies of Ti in HCP HEAs, such as HfTiZr, Al [140] Despite the ongoing controversy, sluggish diffusion in specific HEAs cannot be ruled out and warrants further research.…”

Section: Sluggish Versus Fast Atom Diffusionmentioning

confidence: 99%

“…This phenomenon was attributed to a lattice mismatch δ greater than 3%. [ 139 ] In addition, the diffusion coefficients and activation energies of Ti in HCP HEAs, such as HfTiZr, Al 5 Hf 25 Sc 20 Ti 25 Zr 25 , and Al 15 Hf 25 Sc 10 Ti 25 Zr 25 , were found to be lower than in α ‐Ti. The higher δ and MSAD in Al 5 Hf 25 Sc 20 Ti 25 Zr 25 and Al 15 Hf 25 Sc 10 Ti 25 Zr 25 than in HfTiZr and FCC or BCC HEAs promoted the diffusion of Ti.…”

Section: Transport Propertiesmentioning

confidence: 99%

Multifunctional High Entropy Alloys Enabled by Severe Lattice Distortion

Wang

Gao

et al. 2023

Advanced Materials

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Since 2004, the design of high entropy alloys (HEAs) has generated significant interest within the materials science community due to their exceptional structural and functional properties. By incorporating multiple principal elements into a common lattice, it is possible to create a single‐phase crystal with a highly distorted lattice. This unique feature enables HEAs to offer a promising combination of mechanical and physical properties that are not typically observed in conventional alloys. In this article, we provide an extensive overview of multifunctional HEAs that exhibit severe lattice distortion, covering the theoretical models that were developed to understand lattice distortion, the experimental and computational methods employed to characterize lattice distortion, and most importantly, the impact of severe lattice distortion on the mechanical, physical and electrochemical properties of HEAs. Through this review, we hope to stimulate further research into the study of distorted lattices in crystalline solids.This article is protected by copyright. All rights reserved

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Zr diffusion in BCC refractory high entropy alloys: A case of ‘non-sluggish’ diffusion behavior

Cited by 50 publications

References 72 publications

Interdiffusion in Refractory Metal System with a BCC Lattice: Ti/TiZrHfNbTaMo

Interdiffusion in Refractory Metal System with a BCC Lattice: Ti/TiZrHfNbTaMo

Tensile creep behavior of HfNbTaTiZr refractory high entropy alloy at elevated temperatures

Multifunctional High Entropy Alloys Enabled by Severe Lattice Distortion

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