Deformation-driven modification towards strength-ductility enhancement in Al–Li–Mg–Zn–Cu lightweight high-entropy alloys

Xie, Yuming; Meng, Xianghai; Zang, Ranzhuoluo; Chang, Yuexin; Wan, Long; Huang, Yongxian

doi:10.1016/j.msea.2021.142332

Cited by 19 publications

(3 citation statements)

References 25 publications

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“…For example, Al 80 -Zn 5 -Mg 5 -Li 5 -Cu 5 (at. %) alloys exhibit high tensile strength (674 MPa) and tenable ductility (7.5%) [ 14 , 17 ]. By further increasing the content of Zn element and slightly adjusting that of other elements, the compressive strength of Al 80 -Zn 14 -Mg 2 -Li 2 -Cu 2 (at.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

Zhu

Jiang

et al. 2022

Materials

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Lightweight structural alloys have broad application prospects in aerospace, energy, and transportation fields, and it is crucial to understand the hot deformation behavior of novel alloys for subsequent applications. The deformation behavior and microstructure evolution of a new Al-Zn-Mg-Li-Cu alloy was studied by hot compression experiments at temperatures ranging from 300 °C to 420 °C and strain rates ranging from 0.01 s−1 to 10 s−1. The as-cast Al-Zn-Mg-Li-Cu alloy is composed of an α-Al phase, an Al2Cu phase, a T phase, an η phase, and an η′ phase. The constitutive relationship between flow stress, temperature, and strain rate, represented by Zener–Hollomon parameters including Arrhenius terms, was established. Microstructure observations show that the grain size and the fraction of DRX increases with increasing deformation temperature. The grain size of DRX decreases with increasing strain rates, while the fraction of DRX first increases and then decreases. A certain amount of medium-angle grain boundaries (MAGBs) was present at both lower and higher deformation temperatures, suggesting the existence of continuous dynamic recrystallization (CDRX). The cumulative misorientation from intragranular to grain boundary proves that the CDRX mechanism of the alloy occurs through progressive subgrain rotation. This paper provides a basis for the deformation process of a new Al-Zn-Mg-Li-Cu alloy.

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Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

Zhu

Jiang

et al. 2022

Materials

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“…[4][5][6][7][8] HEA refers to an alloy composed of five or more elements with equiatomic ratio or close to equiatomic ratio, and the content of each principal element is between 5 and 35 at%. [9,10] HEAs exhibit many attractive physical and mechanical properties, including high hardness and strength, [11][12][13] excellent oxidation resistance, [14] corrosion resistance, [15] biocompatibility, [16] and soft magnetic, [17] attribute primarily to the four "core effects" of high-entropy materials: [18] the high entropy effect in thermodynamics, the slow diffusion effect in kinetics, the serious distortion effect in lattice structure, and the cocktail effect in properties. On the one hand, the number of literatures dealing with the tribological behaviors of HEAs illustrates an increasing interest since the early 2005, as shown by the rising number of publications per year (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

A Review on the Tribological Performances of High‐Entropy Alloys

Chen

Zhu

2022

Adv Eng Mater

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Wear is an important form of material loss and failure, and it is usually inevitable in almost all mechanical systems with moving parts. The durability and reliability of engineering components are closely related to their wear resistance. Developing advanced materials to alleviate energy and materials losses in moving mechanical systems still remains a great challenge nowadays. The emergence of novel high‐entropy alloys (HEAs) that compose of multiple principal elements holds great promise for the development of materials with extraordinary wear resistance, due to their high hardness, high wear resistance, and excellent corrosion resistance. Herein, the current research progress of the tribology of HEAs under different conditions is reviewed, including high temperature, dry condition, corrosion solution, and oil lubrication. Specifically, the effects of compositions, microstructures, lubricants, and protective oxide layers on the tribological performance of HEAs are summarized. Furthermore, the underlying mechanisms that are responsible for the excellent wear resistance of HEAs under different conditions are discussed. Finally, the current challenges and the future outlooks are emphasized and addressed systematically. In view of the excellent tribological performances and the diversity of compositional design, HEAs have great potential to be applied in a wide range of mechanical systems to minimize wear.

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“…7.62 亿元，其中稀土储氢材料是目前唯一可以实现大规模商用化的储氢材料，市场规模为 6.9 亿元，占比为 90.55%；其他储氢材料市场规模为 0.72 亿元，占比为 9.45%[12] ] ，2020 年，我国磁性材料产业生产及销售的磁性材料约有 1.3×10 6 t，其中软磁材料为 2.9×10 5 t；预计到 2025 年，软磁材料的生产及销售将达到 4.89×10 5 t，市场规模为 150元素为主，如 Al 80 Li 5 Mg 5 Zn 5 Cu 5 铝基高熵合金密度为 2.88 g/cm 3 ，具有良好的综合力学性能，抗拉强度为 674 MPa，塑性为 7.5%[14] 。低密度轻质高熵合金一般指密度介于钛合金和钢的高熵合金。这类合金通常以 Ti 元素作为主要元素，与超低密度轻质高熵合金相比表现出更好的综合力学性能，如(Zr 0.5 Ti 0.35 Nb 0.15 ) 80 Al 20 合金密度低于6 g/cm3 ，屈服强度高达 1800 MPa，具有 8% 的延伸率[15] 区间具有远超现有的 Inconel-718 与 Haynes-230 镍基高温合金的屈服强度[16] 。 VNbMoTaW 合金在 1600 ℃的屈服强度超过 400 MPa；同时，该合金经过 1400 ℃、19 h 的长时间退火，仍可以保持体心立方结构的 Fe 40 Ni 20 Co 20 Cr 20 高熵合金[18] ，该合金的抗拉强度超过 600 MPa，断裂塑性达到 70%；在 0.1 mol/L 的 H 2 SO 4 溶液环境中，多种元素产生协同表面制备了 FeCoCrAlNi 高熵合金涂层[20] ，涂层的硬度是原基体合金的 3 倍。在 3.5 wt.% NaCl 溶液中的腐蚀试验结果表明，FeCoCrAlNi 高熵合金涂层能有效提高合金的耐腐蚀性能和抗点蚀性能。利用激光熔覆技术在 Ti-6Al-4V 表面制备 TiZrAlNbCo 涂层[21] ，结果表明，该涂层不仅能够有效提高合金的硬度，还使该合金在 3.5 wt.% NaCl 溶液的腐蚀电流密度降低为 3.66×10 −9 A/cm 2 。利用磁控溅射技术制备的一种成分均匀的单相 FCC 高熵合金涂层 FeAlCuCrCoMn[22] ，其电化学实验结果表明，该涂层材料在 3.5 wt.% NaCl 和 5 wt.% NaOH、10 wt.% H 2 SO 4 溶液中的耐腐蚀性能均优于 201 不锈钢。涂 67 Zr 21.67 Hf 21.66 Ta 35 具有良好的生物相容性，杨氏模量为 93 GPa，屈服强度达到 1050 MPa，断裂延伸率为 12.7%，具有较好的…”

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Research Progress and Prospect of High-Entropy Alloy Materials

Li¹,

Wang²,

Lu³

et al. 2023

Chinese Journal of Engineering Science

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With the rapid development of world's technological level and the urgent demand of national economic construction for high-performance alloy materials, traditional single-component alloys gradually fail to satisfy the increasing service requirements. Owing to their unique physical, chemical, and mechanical properties, high-entropy alloys are expected to play an important role in major engineering fields such as national defense, aviation, aerospace, marine, nuclear energy, medical care, and new energy, greatly expanding the design range of metal material compositions. In this paper, based on the specific demands of advanced high-entropy alloy materials in various fields, the characteristics and connotations of high-entropy alloy materials are summarized, and the overall situation and prospects of high-entropy alloy material development are analyzed, as well as the current status of high-entropy alloy development in China and abroad. On this basis, the gaps and deficiencies in the field of high-entropy alloys in China are pointed out. First, some basic raw materials of the high-entropy alloys still rely on imports, which severely threatens the security of the industrial

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Deformation-driven modification towards strength-ductility enhancement in Al–Li–Mg–Zn–Cu lightweight high-entropy alloys

Cited by 19 publications

References 25 publications

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

A Review on the Tribological Performances of High‐Entropy Alloys

Research Progress and Prospect of High-Entropy Alloy Materials

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