Vacuum arc melted and heat treated AlCoCrFeNiTiX based high-entropy alloys: Thermodynamic and microstructural investigations

Güler, Saadet; Alkan, Esra Dokumaci; Alkan, Murat

doi:10.1016/j.jallcom.2022.163901

Cited by 29 publications

(4 citation statements)

References 49 publications

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“…Smelting is the most common preparation method for Bio-HEA, followed by powder metallurgy and additive manufacturing ( Arif et al, 2021 ). The preparation of homogeneous bulk bioethanol by conventional arc melting is challenging, it requires several post-processing (such as remelting), which is a complex process and only yields samples of simple shapes ( Cieslak et al, 2019 ; Güler et al, 2022 ). As a fabrication process that overcomes the limitations of traditional machining methods, additive manufacturing (AM) is considered as an advanced machining method for generating low-defect HEA specimens, which has the advantage of producing parts with complex geometries with high precision and achieving large-scale customization to maximize material, energy and time savings ( Cui et al, 2021 ; Du et al, 2021 ).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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With the continuous progress and development in biomedicine, metallic biomedical materials have attracted significant attention from researchers. Due to the low compatibility of traditional metal implant materials with the human body, it is urgent to develop new biomaterials with excellent mechanical properties and appropriate biocompatibility to solve the adverse reactions caused by long-term implantation. High entropy alloys (HEAs) are nearly equimolar alloys of five or more elements, with huge compositional design space and excellent mechanical properties. In contrast, biological high-entropy alloys (Bio-HEAs) are expected to be a new bio-alloy for biomedicine due to their excellent biocompatibility and tunable mechanical properties. This review summarizes the composition system of Bio-HEAs in recent years, introduces their biocompatibility and mechanical properties of human bone adaptation, and finally puts forward the following suggestions for the development direction of Bio-HEAs: to improve the theory and simulation studies of Bio-HEAs composition design, to quantify the influence of composition, process, post-treatment on the performance of Bio-HEAs, to focus on the loss of Bio-HEAs under actual service conditions, and it is hoped that the clinical application of the new medical alloy Bio-HEAs can be realized as soon as possible.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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“…In contrast, vacuum arc melting boasts rapid preparation, minimal alloy loss, and a reduced risk of introducing impurities, making it a widely favored technique for synthesizing HEAs. [ 29 ] The process for producing HEAs via vacuum arc melting follows these steps: 1) choose the appropriate elemental components to achieve the desired HEA composition, 2) prepare consumable metal electrodes using the selected elements, 3) establish a vacuum chamber or a controlled atmosphere environment, 4) create an electric arc between the consumable metal electrode and a water‐cooled copper crucible, 5) high‐temperature arc melts and vaporizes the electrode, 6) vaporized metal condenses and solidifies on a water‐cooled copper collector, forming the HEAs.…”

Section: Methods For Synthesis Of Heasmentioning

confidence: 99%

Recent Progress in High‐Entropy Alloy Electrocatalysts for Hydrogen Evolution Reaction

Wang,

Xie,

Qin

et al. 2024

Adv Materials Inter

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High‐entropy alloys (HEAs) materials, as promising nanomaterials, have garnered significant attention from researchers due to their excellent performance in the field of hydrogen evolution reaction (HER). The four core effects of HEAs, including the high‐entropy effect, severe lattice distortion effect, sluggish diffusion effect, and cocktail effect, are pivotal in underpinning their remarkable mechanical and thermodynamic properties. Nevertheless, the intricate geometric and electronic structures of HEAs make their catalytic mechanisms exceptionally complex and challenging to decipher. In particular, a thorough analysis of the underlying factors responsible for the outstanding catalytic activity, selectivity, and the ability to maintain stable hydrogen production, even at high current densities, in HEAs is lacking. To provide a systematic exploration of the design and application of HEAs in HER systems, this review commences with an examination of the physicochemical properties of HEAs. It covers a wide range of topics, including the synthesis methods of HEAs, and the major reaction mechanisms of HERs, and presents innovative methods and approaches for designing HEAs specifically in the context of HERs.

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“…Guler et al have reported another second generation of HEMs using vacuum arc melting followed by a heat treatment process. The materials were composed of AlCoCrFeNiTix with (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) stoichiometry [68]. Ti was incorporated in the most studied HEAs (AlCoCrNi).…”

Section: Vacuum Arc Melting Methodsmentioning

confidence: 99%

Recent Progress on Metal Hydride and High Entropy Materials as Emerging Electrocatalysts for Energy Storage and Conversion

Mkhohlakali,

Ramashala,

Mapukata

et al. 2024

Energy Consumption, Conversion, Storage, and Efficiency

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The global energy demand and energy crisis such as the use of fossil fuel for energy conversion and storage have created a need for the development of clean and sustainable renewable energy sources such as fuel cells, batteries, supercapacitors, solar. However, commercialization of renewable energy devices relies heavily on exploring and devising highly functional and stable materials. High entropy materials are emerging, high-performing electrocatalysts due to their intrinsic tenability; hence, these materials may result in earth-abundant catalysts for efficient electrochemical energy storage and conversion. In this chapter, advancements in the energy storage and conversion efficiencies of emerging materials, i.e. high entropy and metal hydrides, as well as their counterparts, i.e. PGMs and MOFs, respectively are discussed. Their applications in fuel cells, hydrogen and oxygen evolution reactions, hydrogen storage, and batteries are deliberated. Furthermore, computer modeling (density functional theory) and machine learning are factored in to supplement the catalytic processes in energy generation and storage reactions.

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Vacuum arc melted and heat treated AlCoCrFeNiTiX based high-entropy alloys: Thermodynamic and microstructural investigations

Cited by 29 publications

References 49 publications

Bio-high entropy alloys: Progress, challenges, and opportunities

Bio-high entropy alloys: Progress, challenges, and opportunities

Recent Progress in High‐Entropy Alloy Electrocatalysts for Hydrogen Evolution Reaction

Recent Progress on Metal Hydride and High Entropy Materials as Emerging Electrocatalysts for Energy Storage and Conversion

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