Microstructure and mechanical properties of multi-component AlCrFeNiMox high-entropy alloys

Dong, Yong; Lu, Yiping; Kong, Jiaorun; Zhang, Junjia; Li, Tingju

doi:10.1016/j.jallcom.2013.03.253

Cited by 248 publications

(43 citation statements)

References 22 publications

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“…6a [5] and AlCrFeNiMo 0.2 [17] eutectic HEAs reported previously. This is attributed to the large-size eutectic cells with straight boundaries of the Mo06 and Ni1.4 HEAs (hundreds of microns, as shown in Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 64%

“…The diversity of the elements in HEAs can lead to distinctive microstructures. For example, eutectic microstructures have been found in AlCoCrFeNi 2.1 [5], AlCrFeNiMo 0.2 [17], Al 1.2 CrCuFeNi 2 [18] and CoFeNi 2 V 0.5 Nb 0.75 [19] HEAs. In fact, alloys with central solid solution structures often show high melting points and inferior castability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Mo and Ni elements on microstructure evolution and mechanical properties of the CoFeNixVMoy high entropy alloys

Jiang

Cao

Jie

et al. 2015

Journal of Alloys and Compounds

140

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Section: Mechanical Propertiesmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Effect of Mo and Ni elements on microstructure evolution and mechanical properties of the CoFeNixVMoy high entropy alloys

Jiang

Cao

Jie

et al. 2015

Journal of Alloys and Compounds

140

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“…It must be pointed out that the theory may work well only in HEAs with high amounts of transition elements, especially, when these transition elements are Co, Cr, Cu, Fe, Ni, Mo, Ti, Mn, and Nb elements. It was found that the Laves phase vanished in AlxCoCrFeNiTi0.5 alloys with high Al contents [66] and that the σ phase vanished in Al0.5CoCrCuFeNiVx alloys with high V contents [36]. This shows that the criterion 1.09 Md > is invalid when the HEAs contain high levels of Al and V elements.…”

Section: Resultsmentioning

confidence: 99%

“…These alloys were named multi-component alloys by Cantor et al [1] and defined as HEAs by Yeh et al [2]. To date, many promising properties have been reported, including highly wear-resistant HEAs like Co1.5CrFeNi1.5Ti and Al0.2Co1.5CrFeNi1.5Ti [4,5]; high-strength body-centered-cubic (BCC) structured AlCoCrFeNiTi0.5 and AlCrFeNiMo0.2 HEAs (at room temperature) [6,7], and NbMoTaV HEA (at elevated temperatures) [8,9], and high corrosion resistant Cu0.5NiAlCoCrFeSi HEA [10]. Researchers are drawn to HEAs due to their unique compositions, microstructures, and adjustable properties.…”

Section: Introductionmentioning

confidence: 99%

A Criterion for Topological Close-Packed Phase Formation in High Entropy Alloys

Dong

Jiang

et al. 2015

Entropy

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Abstract:The stability of topological close-packed (TCP) phases were found to be well related to the average value of the d-orbital energy level ( Md ) for most reported high entropy alloys (HEAs). Excluding some HEAs that contain high levels of the elements aluminum and vanadium, the results of this study indicated that the TCP phases form at Md > 1.09. This criterion, as a semi-empirical method, can play a key role in designing and preparing HEAs with high amounts of transitional elements.

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“…Nevertheless, high-temperature applications demand a sensible balance between strength and tensile ductility, and no known single-phase HEA satisfies such requirements. Perfectly tuned properties may be obtained by combining a soft matrix (bcc) with finely distributed intermetallics, a combination already known to improve hardness [6,7].…”

Section: Introductionmentioning

confidence: 99%

Formation and Disruption of W-Phase in High-Entropy Alloys

Riva

Fung

Searle³

et al. 2016

Metals

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High-entropy alloys (HEAs) are single-phase systems prepared from equimolar or near-equimolar concentrations of at least five principal elements. The combination of high mixing entropy, severe lattice distortion, sluggish diffusion and cocktail effect favours the formation of simple phases-usually a bcc or fcc matrix with minor inclusions of ordered binary intermetallics. HEAs have been proposed for applications in which high temperature stability (including mechanical and chemical stability under high temperature and high mechanical impact) is required. On the other hand, the major challenge to overcome for HEAs to become commercially attractive is the achievement of lightweight alloys of extreme hardness and low brittleness. The multicomponent AlCrCuScTi alloy was prepared and characterized using powder X-ray diffraction (PXRD), scanning-electron microscope (SEM) and atomic-force microscope equipped with scanning Kelvin probe (AFM/SKP) techniques. Results show that the formation of complex multicomponent ternary intermetallic compounds upon heating plays a key role in phase evolution. The formation and degradation of W-phase, Al 2 Cu 3 Sc, in the AlCrCuScTi alloy plays a crucial role in its properties and stability. Analysis of as-melted and annealed alloy suggests that the W-phase is favoured kinetically, but thermodynamically unstable. The disruption of the W-phase in the alloy matrix has a positive effect on hardness (890 HV), density (4.83 g¨cm´3) and crack propagation. The hardness/density ratio obtained for this alloy shows a record value in comparison with ordinary heavy refractory HEAs.

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Microstructure and mechanical properties of multi-component AlCrFeNiMox high-entropy alloys

Cited by 248 publications

References 22 publications

Effect of Mo and Ni elements on microstructure evolution and mechanical properties of the CoFeNixVMoy high entropy alloys

Effect of Mo and Ni elements on microstructure evolution and mechanical properties of the CoFeNixVMoy high entropy alloys

A Criterion for Topological Close-Packed Phase Formation in High Entropy Alloys

Formation and Disruption of W-Phase in High-Entropy Alloys

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