Structure formation and mechanical properties of the high-entropy AlCuNiFeCr alloy prepared by mechanical alloying and spark plasma sintering

Yurkova, A. I.; Cherniavsky, V. V.; Bolbut, V.; Krüger, Manja; Bogomol, I.

doi:10.1016/j.jallcom.2019.01.341

Cited by 74 publications

(19 citation statements)

References 50 publications

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“…Broader peaks can be related to the bcc#2 phase characterized by lattice parameters between 2.87 and 2.94 Å, close to the lattice parameter of Cr, depending on the sample (Table ). The lattice parameters of the two major phases are close to Cr and Mo (elements with the highest melting points), because alloying kinetics is inversely proportional to melting points of pure elements . For samples C and D additional peaks have also been found, which can be related to nontotally‐milled Mn.…”

Section: Summary Of Results Of Alcrfemnmo Alloymentioning

confidence: 88%

Novel Multicomponent Powders from the AlCrFeMnMo Family Synthesized by Mechanical Alloying

et al. 2019

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High‐entropy alloys (HEAs) and multicomponent alloys are known for their promising properties and the almost infinite possibilities of the design of new compositions. The Al–Cr–Fe–Mn–Mo family of HEAs is chosen to promote the formation of a body‐centered cubic (bcc) structure that exhibits high hardness and yield strength. Powder metallurgy is preferred to the liquid route to avoid segregation problems. Two compositions of alloyed powder, equiatomic and optimized, are successfully prepared by mechanical alloying. X‐ray diffraction (XRD) indicates the formation of two major bcc phases: bcc#1 (a1 = 3.13–3.14 Å) and bcc#2 (a2 = 2.87–2.94 Å). Energy transferred during milling depends greatly on the milling device and process conditions. Scanning electron microscopy–energy‐dispersive X‐ray spectroscopy (SEM–EDX) images reveal that high‐energy shocks of balls enable to elaborate homogeneous powder with controlled Fe contamination coming from the grinding vial and balls, whereas low‐energy shocks enable to produce powder free of contamination by Fe, with heterogeneous particles. Finally, the milling process is optimized to obtain a homogeneous alloyed powder with as little contamination as possible.

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Section: Summary Of Results Of Alcrfemnmo Alloymentioning

confidence: 88%

Novel Multicomponent Powders from the AlCrFeMnMo Family Synthesized by Mechanical Alloying

et al. 2019

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“…6). Yurkova et al [1] found similar peaks in their study on "structure formation and mechanical properties of the high-entropy AlCuNiFeCr alloy prepared by mechanical alloying and spark plasma sintering". The release of W and C from decarburization of the WC phase resulted in the generation of the W 3 C and W 2 C phases.…”

Section: Resultsmentioning

confidence: 65%

“…The necessity for working under high temperatures and dynamic loads has called for the development of industries and the creation of new tools and structures to allow for working under such conditions and to enhance the working capacity of materials throughout urgent tasks [1]. In 2004, Yeh et al first identified high-entropy alloys (HEAs) [2], which can be defined as alloys with at least five or more equal quantities elements [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of hot pressing and reinforcement of TiC and WC on the mechanical properties and microstructure of AlCuFeCrNi HEAs alloy

Akkaş

Sudani

2021

SCI SINTER

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In this study, a powder mixture consisting of TiC (titanium carbide) and WC (tungsten carbide) reinforced AlCuNiFeCr was produced using the hot pressing technique. The AlCuNiFeCr powder mixture, TiC and WC were added at a rate of 5 %, 10 % and 15 %, respectively. In order to produce and control to produce parameters have been produced having automation systems type of laboratory a hot pressing machine. Graphite moulds were used in production and sintering processes were carried out in a protective argon gas atmosphere. Composites were produced at a sintering temperature of 900?C and under a pressure 35 MPa and for 4 minutes. To understand the microstructure and mechanical properties of produced specimens, their SEM and EDS analysis, XRD analysis, fracture surface SEM images, SEM mapping of elemental distribution and EDX spectrums, hardness, three-point bending, and corrosion tests were investigated. As a result, the best sample has been identified that belong to AlCuNiFeCr-15 % WC with great features.

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“…It was found that the produced high-configurational entropy powders (50 h) were retained its crystallite size of 10 nm and BCC crystalline structure until 700 °C which ensured the attainment of high thermal stability. Yurkova et al [44] have synthesized AlCuNiFeCr HEA by MA/HEBM who has achieved super saturated SS with a stable BCC crystal structure. The amount of solid solubility, alloy formation, crystal size reduction, structural changes etc.… mainly depends on several HEBM parameters.…”

Section: High Energy Ball Milling Methods (Hebm)mentioning

confidence: 99%

“…Here, CoCrFeMnNi HEA produces a single FCC phase in both synthesized and consolidated conditions. Yurkova et al [44] have consolidated AlCuNiFeCr HEA using SPS which was prepared by MA. The authors were reported that the produced HEA powders were sintered using SPS with different temperatures (700, 800, and 900 °C) at 150 MPa.…”

Section: Spark Plasma Sinteringmentioning

confidence: 99%

Manufacturing Methods, Microstructural and Mechanical Properties Evolutions of High-Entropy Alloys: A Review

et al. 2019

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High entropy alloys (HEAs) are being attracted recently by several researchers, scientists, and academicians to achieve extraordinary and outstanding properties that cannot be obtained from conventional alloys. HEAs are multicomponent alloys in which a minimum of five metallic elements are mixed in an equal molar or non-equal molar ratio. The rapid growth of this field produces a huge amount of scientific papers over the last decade. However, still, there is a need to review various manufacturing methods and their results. Also, the outcome of the scientific articles related to HEAs has ignored the various methods of synthesizing and manufacturing. In this review article, an attempt was made and largely concentrated on the methods and techniques that can be used in the manufacturing and synthesizing of the HEAs. Recently, the properties of HEAs become much better when compared to conventional alloys. Some techniques have succeeded in producing ultrafine microstructure grains which become a leap in industrial fields. Now, the manufacturing methods of conventional alloys are almost familiar and implemented according to the suggestions given by the researchers and academicians based on their work. Therefore, the present review article has demonstrated various methods of manufacturing of HEAs with novel schematics with a preview description for more understanding of the basic work criteria. Besides, this article has reviewed the outcomes of several research articles related to several methods, then compared the outcome of each method with the corresponding mechanical properties, and major challenges of HEAs are discussed and reported.

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Structure formation and mechanical properties of the high-entropy AlCuNiFeCr alloy prepared by mechanical alloying and spark plasma sintering

Cited by 74 publications

References 50 publications

Novel Multicomponent Powders from the AlCrFeMnMo Family Synthesized by Mechanical Alloying

Novel Multicomponent Powders from the AlCrFeMnMo Family Synthesized by Mechanical Alloying

Effect of hot pressing and reinforcement of TiC and WC on the mechanical properties and microstructure of AlCuFeCrNi HEAs alloy

Manufacturing Methods, Microstructural and Mechanical Properties Evolutions of High-Entropy Alloys: A Review

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