Eutectic high-entropy alloys and their applications in materials processing engineering: A review

Liu, Jinhong; Li, Zihan; Lin, Danyang; Tang, Zhengxin; Song, Xiaoguo; He, Peng; Zhang, Shuye; Bian, Hong; Fu, Wei; Song, Yanyu

doi:10.1016/j.jmst.2023.10.057

Cited by 52 publications

(3 citation statements)

References 249 publications

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“…Moreover, the presence of intermetallic compounds (IMCs) in the B phase, characterized by very negative mixing enthalpies and significant differences in atomic radii, contributes to the alloy's strength by forming hard and brittle IMCs. Conversely, the A phase, typically a solid solution with an FCC structure, benefits from the high-entropy effect, which reduces the electronegativity differences among elements, leading to a ductile solid-solution phase [64]. Zheng et el.…”

Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

“…These crystallographic features underpin the superior mechanical properties of EHEAs, making them suitable for various advanced applications where materials are subjected to extreme conditions, such as in aerospace, nuclear, and marine engineering. The interplay of different crystallographic phases and their stability under diverse conditions are key to the alloys' performance, showcasing the critical role of crystallography in the design and application of advanced materials [64].…”

Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

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A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Nartita,

Ionita,

Demetrescu

2024

Crystals

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High-entropy alloys (HEAs) are advanced materials characterized by their unique and complex compositions. Characterized by a mixture of five or more elements in roughly equal atomic ratios, these alloys diverge from traditional alloy formulations that typically focus on one or two principal elements. This innovation has paved the way for subsequent studies that have expanded our understanding of HEAs, highlighting the role of high mixing entropy in stabilizing fewer phases than expected by traditional phase prediction methods like Gibbs’s rule. In this review article, we trace the evolution of HEAs, discussing their synthesis, stability, and the influence of crystallographic structures on their properties. Additionally, we highlight the strength–ductility trade-off in HEAs and explore strategies to overcome this challenge. Moreover, we examine the diverse applications of HEAs in extreme conditions and their promise for future advancements in materials science.

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Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

Section: Formation and Stability Of High-entropy Alloy Structuresmentioning

confidence: 99%

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Nartita,

Ionita,

Demetrescu

2024

Crystals

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“…Entopy Alloys Seventy-two of the 118 recognised elements in the periodic table are potentially useful for alloying HEAs because they are not halogens, noble gases, or radioactive. A large number of HEAs have been made with more than 37 elements [41]. The primary 15 elements employed for producing HEAs include Iron, Nickel, Chromium, Cobalt, Aluminum, Copper, Titanium, Manganese, Vanadium(V), Zirconium, Molybdenum, Niobium, Silicon, Tantalum, and Tin.…”

Section: Elements Used In Preparation Oh Highmentioning

confidence: 99%

Fabrication of High Entropy Alloy by Powder Metallurgy Process

B. Aravinth,

Geetha Arumugam,

R. Mayildurai

2024

Int Res J Adv Engg Hub

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Recently, High entropy alloys have attracted a lot of interest because of their unique properties. which include outstanding strength, remarkable corrosion resistance, and consistent thermal stability. Powder metallurgy is one of the production procedures commonly used to manufacture these alloys. Metal powders are compacted and sintered to create a cohesive material in the production process known as powder metallurgy. The capacity to produce a fine-grained microstructure and a homogeneous distribution of various elements are two benefits of this technology for the synthesis of high entropy alloys. Moreover, powder metallurgy makes it possible to precisely combine various alloying constituents, which can improve the qualities of high entropy alloys even more. Powder metallurgy allows for the manufacture of intricate shapes and dimensions, rendering it well-suited to a range of uses. With the use of powder metallurgy, high entropy alloys can be fabricated with improved mechanical properties and enhanced performance.

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Study on the thermal assistance friction stir lap welding of aluminum alloy and CFRTP

Sun,

Zhang,

Wei

et al. 2024

Polymer Composites

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With the rapid development of transportation and electronic equipment industries, lightweight requires reliable joining technology for metal/polymer. Preheating before welding is a potential way to improve the tensile properties of the joint and reduce the risk of defect formation. In this study, thermal assistance friction stir lap welding (TA‐FSLW) in joining 6061‐T6 aluminum alloy and carbon‐fiber‐reinforced thermoplastic (CFRTP) is investigated. The welds are evaluated by OM image segmentation and statistical calculation, temperature detection in thermal imaging, SEM and EDS of the fracture, tensile, and hardness analysis. From the quantitative analysis results of the width of the CFRTP side‐melting zone and the area of Al alloy fragments in the welding zone, the movement of the polymer chain in the CFRTP of joint is intensified by thermal assistance, which reduces the thickness of the melting zone on the side of the composite material. The area of metal fragments ranges from 100 to 2 × 106 μm2. The microscopic analysis results indicate that preheating enhances the initial thermal motion of molecules. Gaseous polymers are dissociated from the molten state, reducing the number of bubbles in the composite material. Small size fragments are inserted into the molten CFRTP and mechanical interlocking is enhanced due to the uniform interweaving of metals and polymers. A maximum tensile strength of 39.97 MPa is achieved, which increases by 37.6% compared with the conventional FSLW.Highlights Thermal assistance friction stir welding technology is applied to the welding of aluminum alloy with carbon‐fiber‐reinforced thermoplastic. The number and area of aluminum alloy fragments are counted and analyzed by the metal segmentation counting algorithms. Thermal assisted technology reduces the thickness of the melting zone of CFRTP and enhances the material flow and refinement of aluminum alloy fragments.

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Eutectic high-entropy alloys and their applications in materials processing engineering: A review

Cited by 52 publications

References 249 publications

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

Fabrication of High Entropy Alloy by Powder Metallurgy Process

Study on the thermal assistance friction stir lap welding of aluminum alloy and CFRTP

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