A novel Widmanstätten-patterned multicomponent alloy: κ-strengthened VCoNi medium-entropy alloy

T. H. Chou; W. P. Li; Y. H. Zhou; J. Y. Zhang; J. Ju; Y. W. Zhao; Y. X. Wang; Y. L. Zhao; F. R. Chen; X. L. Wang; T. Yang

doi:10.1016/j.scriptamat.2024.116495

A novel Widmanstätten-patterned multicomponent alloy: κ-strengthened VCoNi medium-entropy alloy

T. H. Chou, W. P. Li^*, Y. H. Zhou, J. Y. Zhang, J. Ju, Y. W. Zhao, Y. X. Wang, Y. L. Zhao, F. R. Chen, X. L. Wang, T. Yang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

We strategically introduced a novel Widmanstätten-patterned κ phase into the VCoNi medium-entropy alloy, aiming to enhance the strain-hardening capability while maintaining the large ductility. Microstructural evolutions, mechanical properties, and associated plastic deformation micromechanisms were comprehensively explored. Such a newly designed κ-strengthened alloy exhibited a remarkable strength-ductility combination at room temperature, resulting in an ultimate tensile strength of ∼ 1350 MPa and a uniform elongation of ∼ 45 %. Extensive investigations by transmission electron microscope revealed that the strengthening effect can be mainly attributed to the impeded dislocation motion due to the hard yet deformable κ laths featuring a Widmanstätten pattern. Our results not only enhance the appeal of the VCoNi alloy for advanced structural applications but also open up a new, promising precipitation-strengthening approach. © 2024 Acta Materialia Inc.

Original language	English
Article number	116495
Journal	Scripta Materialia
Volume	258
Online published	11 Dec 2024
DOIs	https://doi.org/10.1016/j.scriptamat.2024.116495
Publication status	Published - 15 Mar 2025

Funding

The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 52222112 and 52101135), the Guangdong Basic and Applied Basic Research Foundation (Grant No:2024A1515011220), the Hong Kong Research Grant Council (RGC) (Grant Nos. CityU C1020–21 G and 11208823). X.L. Wang thanks the Croucher Foundation for the Croucher Senior Research Fellowship (CityU 9509008) and Shenzhen Science and Technology Program (Grant No. JCYJ20220818101203007).

Research Keywords

Mechanical properties
Medium-entropy alloy
Precipitation strengthening
Widmanstätten pattern

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@article{f48271606a2f450486646ff3b1fa1b7d,

title = "A novel Widmanst{\"a}tten-patterned multicomponent alloy: κ-strengthened VCoNi medium-entropy alloy",

abstract = "We strategically introduced a novel Widmanst{\"a}tten-patterned κ phase into the VCoNi medium-entropy alloy, aiming to enhance the strain-hardening capability while maintaining the large ductility. Microstructural evolutions, mechanical properties, and associated plastic deformation micromechanisms were comprehensively explored. Such a newly designed κ-strengthened alloy exhibited a remarkable strength-ductility combination at room temperature, resulting in an ultimate tensile strength of ∼ 1350 MPa and a uniform elongation of ∼ 45 %. Extensive investigations by transmission electron microscope revealed that the strengthening effect can be mainly attributed to the impeded dislocation motion due to the hard yet deformable κ laths featuring a Widmanst{\"a}tten pattern. Our results not only enhance the appeal of the VCoNi alloy for advanced structural applications but also open up a new, promising precipitation-strengthening approach. {\textcopyright} 2024 Acta Materialia Inc.",

keywords = "Mechanical properties, Medium-entropy alloy, Precipitation strengthening, Widmanst{\"a}tten pattern",

author = "Chou, {T. H.} and Li, {W. P.} and Zhou, {Y. H.} and Zhang, {J. Y.} and J. Ju and Zhao, {Y. W.} and Wang, {Y. X.} and Zhao, {Y. L.} and Chen, {F. R.} and Wang, {X. L.} and T. Yang",

year = "2025",

month = mar,

day = "15",

doi = "10.1016/j.scriptamat.2024.116495",

language = "English",

volume = "258",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - A novel Widmanstätten-patterned multicomponent alloy

T2 - κ-strengthened VCoNi medium-entropy alloy

AU - Chou, T. H.

AU - Li, W. P.

AU - Zhou, Y. H.

AU - Zhang, J. Y.

AU - Ju, J.

AU - Zhao, Y. W.

AU - Wang, Y. X.

AU - Zhao, Y. L.

AU - Chen, F. R.

AU - Wang, X. L.

AU - Yang, T.

PY - 2025/3/15

Y1 - 2025/3/15

N2 - We strategically introduced a novel Widmanstätten-patterned κ phase into the VCoNi medium-entropy alloy, aiming to enhance the strain-hardening capability while maintaining the large ductility. Microstructural evolutions, mechanical properties, and associated plastic deformation micromechanisms were comprehensively explored. Such a newly designed κ-strengthened alloy exhibited a remarkable strength-ductility combination at room temperature, resulting in an ultimate tensile strength of ∼ 1350 MPa and a uniform elongation of ∼ 45 %. Extensive investigations by transmission electron microscope revealed that the strengthening effect can be mainly attributed to the impeded dislocation motion due to the hard yet deformable κ laths featuring a Widmanstätten pattern. Our results not only enhance the appeal of the VCoNi alloy for advanced structural applications but also open up a new, promising precipitation-strengthening approach. © 2024 Acta Materialia Inc.

AB - We strategically introduced a novel Widmanstätten-patterned κ phase into the VCoNi medium-entropy alloy, aiming to enhance the strain-hardening capability while maintaining the large ductility. Microstructural evolutions, mechanical properties, and associated plastic deformation micromechanisms were comprehensively explored. Such a newly designed κ-strengthened alloy exhibited a remarkable strength-ductility combination at room temperature, resulting in an ultimate tensile strength of ∼ 1350 MPa and a uniform elongation of ∼ 45 %. Extensive investigations by transmission electron microscope revealed that the strengthening effect can be mainly attributed to the impeded dislocation motion due to the hard yet deformable κ laths featuring a Widmanstätten pattern. Our results not only enhance the appeal of the VCoNi alloy for advanced structural applications but also open up a new, promising precipitation-strengthening approach. © 2024 Acta Materialia Inc.

KW - Mechanical properties

KW - Medium-entropy alloy

KW - Precipitation strengthening

KW - Widmanstätten pattern

UR - http://www.scopus.com/inward/record.url?scp=85211213924&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85211213924&origin=recordpage

U2 - 10.1016/j.scriptamat.2024.116495

DO - 10.1016/j.scriptamat.2024.116495

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 258

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 116495

ER -

A novel Widmanstätten-patterned multicomponent alloy: κ-strengthened VCoNi medium-entropy alloy

Abstract

Funding

Research Keywords

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GRF: Compositional Design and Microstructural Control of Ultrastrong-yet-ductile Chemically Complex Intermetallic Alloys for Advanced High-temperature Structural Applications

CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

CROU_RMG: In Situ Neutron Diffraction Study of Deformation at Low Temperatures- RMGS

Cite this

A novel Widmanstätten-patterned multicomponent alloy: κ-strengthened VCoNi medium-entropy alloy

Abstract

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Compositional Design and Microstructural Control of Ultrastrong-yet-ductile Chemically Complex Intermetallic Alloys for Advanced High-temperature Structural Applications

CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

CROU_RMG: In Situ Neutron Diffraction Study of Deformation at Low Temperatures- RMGS

Cite this