Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations

Huiqiang Ying; Xiao Yang; Haiyan He; Ao Yan; Ke An; Yubin Ke; Zhenduo Wu; Song Tang; Ziyou Zhang; Hongliang Dong; Stefanus Harjo; Tamás Ungár; He Zhu; Qingya Sun; Xun-Li Wang; Si Lan

doi:10.1016/j.scriptamat.2024.116181

Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations

Huiqiang Ying, Xiao Yang, Haiyan He^*, Ao Yan, Ke An, Yubin Ke, Zhenduo Wu, Song Tang, Ziyou Zhang, Hongliang Dong, Stefanus Harjo, Tamás Ungár, He Zhu, Qingya Sun, Xun-Li Wang, Si Lan^*

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

Nanoscale chemical fluctuations and their effect on the deformation behavior of CrFeCoNi-based high-entropy alloys (HEAs) were investigated using small-angle scattering and in situ neutron diffraction measurements. Small-angle scattering results demonstrated the presence of nano (>10 nm) chemical fluctuations in the as-prepared CrFeCoNiPd HEAs, which was attributed to the negative mixing of enthalpy and the significant atomic radius difference between Pd and the constituent elements in the CrFeCoNi-based alloys. Subsequent tensile tests demonstrated that the yield and tensile strengths of the as-prepared CrFeCoNiPd HEA surpass those of the as-prepared CrMnFeCoNi HEA. Neutron diffraction data analysis revealed an anomalous response of dislocation evolution with the strain, including a more significant linear increase of dislocation density and a greater proportion of screw dislocations in the as-prepared CrFeCoNiPd HEA than in the as-prepared CrMnFeCoNi HEA, which contributed to its enhanced strength. This study paves a new avenue for developing high-performance alloys by modulating chemical fluctuations. © 2024 Acta Materialia Inc.

Original language	English
Article number	116181
Journal	Scripta Materialia
Volume	250
Online published	22 May 2024
DOIs	https://doi.org/10.1016/j.scriptamat.2024.116181
Publication status	Published - 1 Sept 2024

Funding

This study was financially supported by the National Key R&D Program of China (nos. 2021YFA1200203 and 2021YFB3802800 ), the National Natural Science Foundation of China (nos. 52222104 , 12261160364 , 51871120 , 52250402 , and 52025025 ), and the Natural Science Foundation of Jiangsu Province (no. BK20200019 ). S. Lan acknowledges the support from the Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology. X.-L. Wang acknowledges support from the Shenzhen Science and Technology Program (Project no. JCYJ20220818101203007 ) and partial support by the Research Grants Council of Hong Kong (Project No. CityU 11209822 ). H. He acknowledges the support from the Guangdong Basic and Applied Basic Research Foundation ( 2023A1515140001 ) and the Large Scientific Facility Open Subject of Songshan Lake ( KFKT2022B08 ), Dongguan, Guangdong. This research used the resources of the China Spallation Neutron Source in Dongguan, China and the Advanced Photon Source, a US Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory (no. DE-AC02-06CH11357 ), resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, and TAKUMI beamline of the Materials and Life Science Experimental Facility, Japan Proton Accelerator Research Complex, under Proposal Number 2022L0400 .

Research Keywords

Chemical fluctuation
High-entropy alloy
Neutron diffraction
Small-angle scattering

Access Output

10.1016/j.scriptamat.2024.116181

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

Ying, H., Yang, X., He, H., Yan, A., An, K., Ke, Y., Wu, Z., Tang, S., Zhang, Z., Dong, H., Harjo, S., Ungár, T., Zhu, H., Sun, Q., Wang, X.-L., & Lan, S. (2024). Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations. Scripta Materialia, 250, Article 116181. https://doi.org/10.1016/j.scriptamat.2024.116181

@article{5297ff4e07b7445d831469234a1dfc48,

title = "Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations",

abstract = "Nanoscale chemical fluctuations and their effect on the deformation behavior of CrFeCoNi-based high-entropy alloys (HEAs) were investigated using small-angle scattering and in situ neutron diffraction measurements. Small-angle scattering results demonstrated the presence of nano (>10 nm) chemical fluctuations in the as-prepared CrFeCoNiPd HEAs, which was attributed to the negative mixing of enthalpy and the significant atomic radius difference between Pd and the constituent elements in the CrFeCoNi-based alloys. Subsequent tensile tests demonstrated that the yield and tensile strengths of the as-prepared CrFeCoNiPd HEA surpass those of the as-prepared CrMnFeCoNi HEA. Neutron diffraction data analysis revealed an anomalous response of dislocation evolution with the strain, including a more significant linear increase of dislocation density and a greater proportion of screw dislocations in the as-prepared CrFeCoNiPd HEA than in the as-prepared CrMnFeCoNi HEA, which contributed to its enhanced strength. This study paves a new avenue for developing high-performance alloys by modulating chemical fluctuations. {\textcopyright} 2024 Acta Materialia Inc.",

keywords = "Chemical fluctuation, High-entropy alloy, Neutron diffraction, Small-angle scattering",

author = "Huiqiang Ying and Xiao Yang and Haiyan He and Ao Yan and Ke An and Yubin Ke and Zhenduo Wu and Song Tang and Ziyou Zhang and Hongliang Dong and Stefanus Harjo and Tam{\'a}s Ung{\'a}r and He Zhu and Qingya Sun and Xun-Li Wang and Si Lan",

year = "2024",

month = sep,

day = "1",

doi = "10.1016/j.scriptamat.2024.116181",

language = "English",

volume = "250",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations

AU - Ying, Huiqiang

AU - Yang, Xiao

AU - He, Haiyan

AU - Yan, Ao

AU - An, Ke

AU - Ke, Yubin

AU - Wu, Zhenduo

AU - Tang, Song

AU - Zhang, Ziyou

AU - Dong, Hongliang

AU - Harjo, Stefanus

AU - Ungár, Tamás

AU - Zhu, He

AU - Sun, Qingya

AU - Wang, Xun-Li

AU - Lan, Si

PY - 2024/9/1

Y1 - 2024/9/1

N2 - Nanoscale chemical fluctuations and their effect on the deformation behavior of CrFeCoNi-based high-entropy alloys (HEAs) were investigated using small-angle scattering and in situ neutron diffraction measurements. Small-angle scattering results demonstrated the presence of nano (>10 nm) chemical fluctuations in the as-prepared CrFeCoNiPd HEAs, which was attributed to the negative mixing of enthalpy and the significant atomic radius difference between Pd and the constituent elements in the CrFeCoNi-based alloys. Subsequent tensile tests demonstrated that the yield and tensile strengths of the as-prepared CrFeCoNiPd HEA surpass those of the as-prepared CrMnFeCoNi HEA. Neutron diffraction data analysis revealed an anomalous response of dislocation evolution with the strain, including a more significant linear increase of dislocation density and a greater proportion of screw dislocations in the as-prepared CrFeCoNiPd HEA than in the as-prepared CrMnFeCoNi HEA, which contributed to its enhanced strength. This study paves a new avenue for developing high-performance alloys by modulating chemical fluctuations. © 2024 Acta Materialia Inc.

AB - Nanoscale chemical fluctuations and their effect on the deformation behavior of CrFeCoNi-based high-entropy alloys (HEAs) were investigated using small-angle scattering and in situ neutron diffraction measurements. Small-angle scattering results demonstrated the presence of nano (>10 nm) chemical fluctuations in the as-prepared CrFeCoNiPd HEAs, which was attributed to the negative mixing of enthalpy and the significant atomic radius difference between Pd and the constituent elements in the CrFeCoNi-based alloys. Subsequent tensile tests demonstrated that the yield and tensile strengths of the as-prepared CrFeCoNiPd HEA surpass those of the as-prepared CrMnFeCoNi HEA. Neutron diffraction data analysis revealed an anomalous response of dislocation evolution with the strain, including a more significant linear increase of dislocation density and a greater proportion of screw dislocations in the as-prepared CrFeCoNiPd HEA than in the as-prepared CrMnFeCoNi HEA, which contributed to its enhanced strength. This study paves a new avenue for developing high-performance alloys by modulating chemical fluctuations. © 2024 Acta Materialia Inc.

KW - Chemical fluctuation

KW - High-entropy alloy

KW - Neutron diffraction

KW - Small-angle scattering

UR - http://www.scopus.com/inward/record.url?scp=85193632171&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85193632171&origin=recordpage

U2 - 10.1016/j.scriptamat.2024.116181

DO - 10.1016/j.scriptamat.2024.116181

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 250

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 116181

ER -

Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations

Abstract

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

GRF: Suppression of Ductile-to-brittle Transition and Low-temperature Deformation Mechanisms in Bcc High-entropy Alloys - Insights from In-situ Neutron Diffraction Studies

Cite this

Anomalous dislocation response to deformation strain in CrFeCoNiPd high-entropy alloys with nanoscale chemical fluctuations

Abstract

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Suppression of Ductile-to-brittle Transition and Low-temperature Deformation Mechanisms in Bcc High-entropy Alloys - Insights from In-situ Neutron Diffraction Studies

Cite this