Stability of FeCrNiTiAl high-entropy alloy at high temperature

Liu, Yong; Qu, Nan; Zhao, Xiaoliang; Chen, Jiaying; Zhu, Jingchuan; Lai, Zhonghong

doi:10.1080/25787616.2021.2019390

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…Using these design strategies, many cost-effective HEAs have been developed. For instance, the Co-free HEAs with relatively lower cost include the equiatomic FeMnCrNi, AlCrFeNi [24], FeCrNiMnCu [25], NiMnFeCu [26], AlFeMnSi [27] and FeCrNiTiAl [28] alloys. But these alloy systems are equiatomic or near-equiatomic, there is less potency for further exploitation of the new alloys with better performance.…”

Section: Alloy Design Strategymentioning

confidence: 99%

Cost-Effective Fe-Rich High-Entropy Alloys: A Brief Review

Yin¹,

Atrens²,

Huang³

et al. 2023

High Entropy Materials - Microstructures and Properties

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High-entropy alloys (HEAs) have attracted increased attention due to their extraordinary properties. However, the multicomponent characteristic of equiatomic HEAs inevitably leads to high material costs, which thus limits their widespread industrial applications. Although HEAs are claimed to be suitable for applications in extreme environment due to their comprehensive properties, the actual properties of HEAs dramatically vary with compositions and processes. Therefore, the development of cost-effective HEAs with comprehensive properties is indispensable for industrial uses. Till now, although comprehensive review papers on HEAs are available, few works focused on the cost-effectiveness of HEAs, particularly Fe-rich HEAs recently developed. This review thus aims to fill this gap by reviewing the current research progress in Fe-rich HEAs with a focus on the composition design, microstructure, and properties, including mechanical properties, and resistances for oxidation, wear, and corrosion. The challenges for applying cost-effective Fe-rich HEAs into industries are also arising as future research topics.

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Section: Alloy Design Strategymentioning

confidence: 99%

Cost-Effective Fe-Rich High-Entropy Alloys: A Brief Review

Yin¹,

Atrens²,

Huang³

et al. 2023

High Entropy Materials - Microstructures and Properties

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“…This is because, at a temperature of 1000 • C, increased Laves precipitation appears in the alloy, which leads to a reduction in the internal elastic stresses present in the dendritic structure. In this case, the hardness of the alloy declines notably [3].…”

Section: Introductionmentioning

confidence: 96%

Structural Stability of Titanium-Based High-Entropy Alloys Assessed Based on Changes in Grain Size and Hardness

Górniewicz,

Karczewski,

Bojar

et al. 2023

Materials

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The thermal stability of the grain structure and mechanical properties of the high-entropy two-phase TiCoCrFeMn alloy produced by powder metallurgy, assessed based on microhardness measurements, was analyzed in this work. For this purpose, material obtained via sintering using the U-FAST method was subjected to long-term heating at a temperature of 1000 °C for up to 1000 h in an argon atmosphere. For homogenization times of 1, 10, 20, 50, 100, and 1000 h, grain size changes in the identified phase components of the matrix were assessed, and microhardness measurements were conducted using the Vickers method. It has been shown that the changes in the analyzed parameters are closely correlated with non-monotonic modifications in the chemical composition. It was found that the tested alloy achieved structural stability after 100 h of annealing. A stable grain size was obtained in the BCC solid solution of approximately 2 µm and the two-phase BCC+C14 mixture of roughly 0.4 µm. Long-term heating for up to 1000 h caused the grain structure to grow to 2.7 µm and 0.7 µm, respectively, with a simultaneous decrease in hardness from 1065 HV to 1000 HV. The chromium and titanium diffusion coefficient values responsible for forming the BCC solid solution and the Laves C14 phase, including the material matrix, were also determined at this level to be DCr = 1.28 × 10−19 (m2·s−1) and DTi = 1.04 × 10−19 (m2·s−1), demonstrating the sluggish diffusion effect typical of high-entropy alloys.

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“…Furthermore, recent investigations have unveiled the potential of HEAs in modifying phonon modes [11], thereby modulating their mechanical, electrical, and optical properties. This revelation positions HEAs as a promising avenue for exploration in nonlinear optics (NLO), offering distinctive advantages such as low resistivity [12], thermal stability [13], and a limitless array of chemical compositions. In light of these advancements and prospects, our study marks a significant milestone by showcasing the exciting potential of HEA thin films, specifically based on the equiatomic CrMnFeCoNi Cantor alloy with fcc structure, for NLO applications within the visible range.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the nonlinear optical response of high-entropy alloy thin films through compositional and structural modification

Benrazzouq,

Gunina,

Povarov

et al. 2024

Advances in Optical Thin Films VIII

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Multielement composition with both structural order and chemical disorder are known as high entropy alloys (HEAs). Such materials exhibit unexpected mechanical and catalytic properties. However, the effect of composition and the structure of HEAs on their functional properties including the optical ones is still not well studied. Therefore, this work focuses on the development of HEA thin films using a Cantor alloy (FeCrMnNiCo) base, modified by varying a sixth element (Pt, Al, and Ti) concentrations to evaluate the changes in the film's structure and microstructure. The films were deposited via DC magnetron co-sputtering, which provided control over stoichiometry and film morphology. Then, the structural, electrical, and optical properties were characterized using X-ray diffraction, high-resolution transmission electron microscopy, resistivity measurement, and optical reflection measurements. Moreover, the interaction of the films with coherent light was also examined, revealing their nonlinear optical response to photons of visible and near-infrared range.In details, the structural analysis shows abundant nanotwins in the initial Cantor (CrMnFeCoNi) and CrMnFeCoNiPt films, both of which possessed a single fcc crystalline structure. However, CrMnFeCoNiAl films transitioned from a single fcc phase to a duplex fcc + bcc phase structure, eventually stabilizing as a single bcc structure. Such duplex fcc+bcc phase exhibited a low degree of nanotwins with larger grains of each phase. In contrast, CrMnFeCoNiTi films displayed an amorphous structure at various Ti contents. The study also advances the understanding of structure-related functional properties of HEAs and sets the stage for their future utilization in non-linear optics and photonics

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Stability of FeCrNiTiAl high-entropy alloy at high temperature

Cited by 8 publications

References 27 publications

Cost-Effective Fe-Rich High-Entropy Alloys: A Brief Review

Cost-Effective Fe-Rich High-Entropy Alloys: A Brief Review

Structural Stability of Titanium-Based High-Entropy Alloys Assessed Based on Changes in Grain Size and Hardness

Tailoring the nonlinear optical response of high-entropy alloy thin films through compositional and structural modification

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