Sluggish dendrite growth in an undercooled high entropy alloy

Zhang, Jianbao; Li, Xin; Zhang, Yachan; Zhao, Fan; Wu, Hongxing; Wang, Xian-Zong; Zhou, Qing; Wang, Haifeng

doi:10.1016/j.intermet.2020.106714

Cited by 14 publications

(10 citation statements)

References 29 publications

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“…Li et al [16] showed the volume fraction of the metastable bcc phase for an undercooled sample to be 15 % after solidification. In work [17], the volume fraction of the secondary phase (bcc) of 16-18 % was reported to be independent on liquid undercooling for ΔT between 50 and 300 K. Wang et al [17] and Zhang et al [18] suggested that the bcc phase was formed as a secondary phase in their studies, which is different from the findings of the present work in what the bcc appears as a transient primary phase in the undercooled melts. Wang et al [17] claimed that segregation to interdendritic regions leads to the formation of Ni-and Cr-rich islands, which would then be susceptible, as in stainless steels, to form an fcc and a bcc phase, respectively.…”

Section: Fcc-bcc Nucleation and Growth Competitioncontrasting

confidence: 82%

“…Precipitates of a minor bcc phase in the fcc matrix were also reported for CoCrFeNi solidified after melt undercooling in the works of Li et al [16], Wang et al [17], and Zhang et al [18], solidified using B2O3 glass fluxing. Only a single fcc solid solution was observed in the ternary CoFeNi and binary CoNi alloys in Ref.…”

Section: Introductionmentioning

confidence: 53%

“…As mentioned in the Introduction, Li et al [16], Wang et al [17], and Zhang et al [18] reported on metastable bcc phase precipitates in the final microstructure of undercooled CoCrFeNi alloy processed by the glass fluxing method. Li et al [16] showed the volume fraction of the metastable bcc phase for an undercooled sample to be 15 % after solidification.…”

Section: Fcc-bcc Nucleation and Growth Competitionmentioning

confidence: 97%

“…Recently, Zhang et al [18] reported the growth velocity of the fcc phase as a function of melt undercooling for the quaternary CoCrFeNi alloy in comparison to the ternary CoFeNi and binary CoNi alloys. The velocity was calculated from high-speed video data, as in the present work, but the samples were undercooled using the glass fluxing technique.…”

Section: Crystal Growth Kineticsmentioning

confidence: 99%

“…Only a single fcc solid solution was observed in the ternary CoFeNi and binary CoNi alloys in Ref. [18].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys

Andreoli

Witusiewicz

et al. 2021

Acta Materialia

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Section: Fcc-bcc Nucleation and Growth Competitioncontrasting

confidence: 82%

Section: Introductionmentioning

confidence: 53%

Section: Fcc-bcc Nucleation and Growth Competitionmentioning

confidence: 97%

Section: Crystal Growth Kineticsmentioning

confidence: 99%

“…Only a single fcc solid solution was observed in the ternary CoFeNi and binary CoNi alloys in Ref. [18].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys

Andreoli

Witusiewicz

et al. 2021

Acta Materialia

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Native Oxidation and Complex Magnetic Anisotropy‐Dominated Soft Magnetic CoCrFeNi‐Based High‐Entropy Alloy Thin Films

Zhang

Wang

et al. 2022

Advanced Science

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Soft magnetic high-entropy alloy thin films (HEATFs) exhibit remarkable freedom of material-structure design and physical-property tailoring, as well as, high cut-off frequencies and outstanding electrical resistivities, making them potential candidates for high-frequency magnetic devices. In this study, a CoCrFeNi film with excellent soft magnetic properties is developed by forming a novel core-shell structure via native oxidation, with ferromagnetic elements Fe, Co, and Ni as the core and the Cr oxide as the shell layer. The core-shell structure enables a high saturation magnetization, enhances the electrical resistivity, and thus reduces the eddy-current loss. For further optimizing the soft magnetic properties, O is deliberately introduced into the HEATFs, and the O-incorporated HEATFs exhibit an electrical resistivity of 237 μ𝛀•cm, a saturation magnetization of 535 emu cm −3 , and a coercivity of 23 A m −1 . The factors that determine the ferromagnetism and coercivity of the CoCrFeNi-based HEATFs are examined in detail by evaluating the microstructures, magnetic domains, chemical valency, and 3D microscopic compositional distributions of the prepared films. These results are anticipated to provide insights into the magnetic behaviors of soft magnetic HEATFs, as well as aid in the construction of a promising material-design strategy for these unique materials.

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Optimized Tribological Performance Deriving From Multiple Strengthening Effects of Fe–Ni–Mo–Cr Alloy

Ruan

Wei

2022

Metall Mater Trans A

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Sluggish dendrite growth in an undercooled high entropy alloy

Cited by 14 publications

References 29 publications

In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys

In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys

Native Oxidation and Complex Magnetic Anisotropy‐Dominated Soft Magnetic CoCrFeNi‐Based High‐Entropy Alloy Thin Films

Optimized Tribological Performance Deriving From Multiple Strengthening Effects of Fe–Ni–Mo–Cr Alloy

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