Alloying behavior in multi-component AlCoCrCuFe and NiCoCrCuFe high entropy alloys

Sathiyamoorthi, Praveen; Murty, B.S.; Kottada, Ravi Sankar

doi:10.1016/j.msea.2011.11.044

Cited by 359 publications

(128 citation statements)

References 22 publications

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“…These results agree closely with the results presented above. Furthermore, an alloy produced by mechanical alloying was found after 15 h of milling to contain a minority bcc phase together with a main fcc phase [20]. In alloy lms only a fcc structure was detected at ambient temperature [21].…”

Section: Tablementioning

confidence: 99%

Crystalline Structures of Some High Entropy Alloys Obtained by Neutron and X-Ray Diffraction

et al. 2015

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The understanding of the structure and the stability of high entropy alloys is still incomplete and the mechanisms behind the composition-property relationships are unclear. One reason is that few systematic and accurate determinations of their composition-dependent structure on atomic level have been made. In this paper some results on the structure obtained by X-ray and neutron diraction of the CoCrFeNi alloy, to which Pd, Sn and Cu have been added in dierent amounts, are reported. The investigations make it obvious that none of the alloys is completely homogeneous, as has earlier been suggested, and that they do not form a perfect solid solution.

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Section: Tablementioning

confidence: 99%

Crystalline Structures of Some High Entropy Alloys Obtained by Neutron and X-Ray Diffraction

et al. 2015

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“…As a result, more and more researchers agreed with this high-entropy alloy concept, and started to investigate high-entropy alloys [3][4][5][6].…”

Section: Open Accessmentioning

confidence: 99%

Microstructures and Mechanical Properties of TiCrZrNbNx Alloy Nitride Thin Films

Tsau

Chang

2013

Entropy

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Abstract:The pure elements Ti, Zr, Cr, Nb were selected to produce an TiCrZrNb alloy target and deposited thin films thereof by a reactive high vacuum DC sputtering process. Nitrogen was used as the reactive gas to deposit the nitride thin films. The effect of nitriding on the properties of the TiCrZrNbN x film was tested by changing the nitrogen ratio of the atmosphere. All of the as-deposited TiCrZrNbN x nitride films exhibited an amorphous structure. The film thickness decreases by increasing the N 2 flow rate, because the Ar flow rate decreased and the target was poisoned by nitrogen. The hardness and Young's modulus were also measured by a nano-indenter. The hardness and Young's modulus of the TiCrZrNbN x nitride films were all lower than those of a TiCrZrNb metallic film.

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“…[15][16][17][18][19][20][21][22] In several studies, the formation of compounds and secondary phases have been observed, [15,19,[23][24][25] which implies that configurational entropy alone is not sufficient to suppress the compound formation. Moreover, single phase HEAs were observed only in a particular compositional range, and phase separation was observed in most of the HEAs.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, single phase HEAs were observed only in a particular compositional range, and phase separation was observed in most of the HEAs. [21,[26][27][28][29][30][31][32] The thermodynamic analysis of multicomponent alloys implies that enthalpy and non-configurational entropy play significant roles in phase stability, and the configurational entropy plays a primary role only when a single phase is observed. [15] Moreover, the formation of the random solid solution depends on various factors such as alloy melting temperature, processing temperature, interatomic correlations, and the characteristics of individual elements.…”

Section: Introductionmentioning

confidence: 99%

High‐Entropy Alloys: Potential Candidates for High‐Temperature Applications – An Overview

2017

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Multi-principal elemental alloys, commonly referred to as high-entropy alloys (HEAs), are a new class of emerging advanced materials with novel alloy design concept. Unlike the design of conventional alloys, which is based on one or at most two principal elements, the design of HEA is based on multi-principal elements in equal or near-equal atomic ratio. The advent of HEA has revived the alloy design perception and paved the way to produce an ample number of compositions with different combinations of promising properties for a variety of structural applications. Among the properties possessed by HEAs, sluggish diffusion and strength retention at elevated temperature have caught wide attention. The need to develop new materials for high-temperature applications with superior high-temperature properties over superalloys has been one of the prime concerns of the high-temperature materials research community. The current article shows that HEAs have the potential to replace Ni-base superalloys as the next generation hightemperature materials. This review focuses on the phase stability, microstructural stability, and high-temperature mechanical properties of HEAs. This article will be highly beneficial for materials science and engineering community whose interest is in the development and understanding of HEAs for high-temperature applications.

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Alloying behavior in multi-component AlCoCrCuFe and NiCoCrCuFe high entropy alloys

Cited by 359 publications

References 22 publications

Crystalline Structures of Some High Entropy Alloys Obtained by Neutron and X-Ray Diffraction

Crystalline Structures of Some High Entropy Alloys Obtained by Neutron and X-Ray Diffraction

Microstructures and Mechanical Properties of TiCrZrNbNx Alloy Nitride Thin Films

High‐Entropy Alloys: Potential Candidates for High‐Temperature Applications – An Overview

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