Controlled formation of coherent cuboidal nanoprecipitates in body-centered cubic high-entropy alloys based on Al2(Ni,Co,Fe,Cr)14 compositions

Ma, Yue; Wang, Q.; Jiang, Beibei; Li, C.L.; Hao, Jiamiao; Li, X.N.; Chen, Dong; Nieh, T.G.

doi:10.1016/j.actamat.2018.01.050

Cited by 301 publications

(102 citation statements)

References 64 publications

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“…A novel concept of "multi-component high-entropy alloys (HEAs)" was defined by Yeh et al [23], in which a single solid solution with body-centered cubic (BCC)structure [24], face-centered cubic (FCC)structure [25] and hexagonal close-packed (HCP) structure [26] is synthesized. Owing to the high entropy effect in a multicomponent system, the formation of intermetallic compounds can be greatly inhibited during the solidification.…”

Section: Introductionmentioning

confidence: 99%

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

Zhang

Jiang

et al. 2020

Mater. Res. Express

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TiAlCoCr x FeNihigh-entropy alloys (HEAs) coatings were fabricated on the surface of Ti6Al4V by laser cladding. Their microstructural evolution with the increase in x value (x=0, x=1.0, x=2.0) was investigated in detail. Besides that, the investigation into the effects of the Cr content on their corrosion behaviors and mechanical properties (in terms of hardness and wear resistance) was also carried out comprehensively. The results indicated that two kinds of phases (a solid solution with thehexagonal close-packed (HCP) structureand Ti 2 Ni) were synthesized in the coatings, and the HCP content was gradually increased with the increase in x accompanied with the decrease in Ti 2 Ni content. A HEA coating only composed of single HCP was successfully prepared when x reached 2.0. The electrochemical and immersion tests all confirmed that the coating with x=2.0demonstrated the most excellent corrosion resistance in a0.1 mol·L −1 HCl solution from different aspects including corrosion tendency and corrosion rate without the applied potential, the formation difficult/stability of the passive film and the dissolution rate in the passive state, and corrosion surface morphology. The averagemicrohardness values of the coatings weregraduallyincreasedfrom 656HV 0.2 to 800 HV 0.2 with increasing xfrom 0 to 2.0, which wereabout double that of the substrate (350 HV 0.2 ). Wear resistance of the coatings also exhibited the upward tendency with increasing the x values (0.562 mm 3 at x=2.0, 0.640 mm 3 at x=1.0, 0.641 mm 3 at x=0 and 1.419 mm 3 for the substrate). More Cr addition into the cladding material will contribute to the formation of a HEA coating composed of single HCPwith excellent corrosion and wear resistance.

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Section: Introductionmentioning

confidence: 99%

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

Zhang

Jiang

et al. 2020

Mater. Res. Express

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“…Up to now, many researchers have discovered the highentropy alloys usually form single-phase solid solutions, such as simple face-centered cubic, body-centered cubic, hexagonal closed-packed solid solution phases, and even amorphous in the as-cast state as opposed to many intermetallic compounds and other complex structures [4][5][6]. So the development of high-entropy alloys is one of the breakthroughs to the alloy design in traditional physical metallurgy, and with the appropriate composition design, it becomes possible to explore new material with promising properties such as higher strength, good thermal stability, excellent wear, superior corrosion resistance and so on [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Jin¹,

Gu²,

Feng

et al. 2019

Materialwissenschaft Werkst

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To successfully fabricate high‐entropy alloys by powder metallurgy, laser cladding, or thermal sprayed method, the high‐entropy alloy powders possessing good homogeneous microstructure are very important. However, the study on the properties of the high‐entropy alloy powder has still been lacking. In this work, an equiatomic CoCrFeMnNi high‐entropy alloy powder with spherical shape was synthesized by gas atomization method. The as‐atomized CoCrFeMnNi high‐entropy alloy powder is composed of a single face‐centered cubic solid solution phase with the particle size of 34.0 μm. Furthermore, the as‐atomized powder exhibits excellent corrosion resistance in 10 % hydrochloric acid solution to 304 L stainless steel powder, and also shows an excellent soft magnetic behavior. Therefore, the gas atomization method can be used to generate other kinds of high‐entropy alloy powders for many challenging industrial applications.

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“…In both of the two definitions, HEAs have single or multiple solidsolution structures as major phases, such as face-centered cubic (FCC), body-centered cubic (BCC), and hexagonal close-packed (HCP) phases. Some HEAs possess intermetallics as strengthening phases, such as L12 8 and B2 [9][10][11] phases. It is a brand-new research area on alloy design, which has gained growing attention all over the world.…”

Section: Introductionmentioning

confidence: 99%

Fundamental understanding of mechanical behavior of high-entropy alloys at low temperatures: A review

et al. 2018

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The basic principle of high-entropy alloys (HEAs) is that high mixing entropies of solid-solution phases enhance the phase stability, which renders us a new strategy on alloy design. The current research of HEAs mostly emphasizes mechanical behavior at room and higher temperatures. Relatively fewer papers are focused on low-temperature behaviors, below room temperature. However, based on the published papers, we can find that the low-temperature properties of HEAs are generally excellent. The great potential for cryogenic applications could be expected on HEAs. In this article, we summarized and discussed the mechanical behaviors and deformation mechanisms, as well as stacking-fault energies, of HEAs at low temperatures. The comparison of low-temperature properties of HEAs and conventional alloys will be provided. Future research directions will be suggested at the end.

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Controlled formation of coherent cuboidal nanoprecipitates in body-centered cubic high-entropy alloys based on Al2(Ni,Co,Fe,Cr)14 compositions

Cited by 301 publications

References 64 publications

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

Investigation into corrosion and wear behaviors of laser-clad coatings on Ti6Al4V

CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Fundamental understanding of mechanical behavior of high-entropy alloys at low temperatures: A review

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