Nanoprecipitate-Strengthened High-Entropy Alloys

Liyuan Liu; Yang Zhang; Jihong Han; Xiyu Wang; Wenqing Jiang; Chain-Tsuan Liu; Zhongwu Zhang; Peter K. Liaw

doi:10.1002/advs.202100870

Nanoprecipitate-Strengthened High-Entropy Alloys

Liyuan Liu, Yang Zhang, Jihong Han, Xiyu Wang, Wenqing Jiang, Chain-Tsuan Liu, Zhongwu Zhang^*, Peter K. Liaw^*

^*Corresponding author for this work

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

272 Citations (Scopus)

61 Downloads (CityUHK Scholars)

Abstract

Multicomponent high-entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body-centered-cubic (BCC) or hexagonal-close-packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced-centered-cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate-strengthened HEAs and their strengthening mechanisms. The alloy-design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined.

Original language	English
Article number	2100870
Journal	Advanced Science
Volume	8
Issue number	23
Online published	22 Oct 2021
DOIs	https://doi.org/10.1002/advs.202100870
Publication status	Published - 8 Dec 2021

Research Keywords

alloy design
high-entropy alloys
mechanical properties
nanoprecipitates
precipitation strengthening

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "Nanoprecipitate-Strengthened High-Entropy Alloys",

abstract = "Multicomponent high-entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body-centered-cubic (BCC) or hexagonal-close-packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced-centered-cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate-strengthened HEAs and their strengthening mechanisms. The alloy-design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined.",

keywords = "alloy design, high-entropy alloys, mechanical properties, nanoprecipitates, precipitation strengthening",

author = "Liyuan Liu and Yang Zhang and Jihong Han and Xiyu Wang and Wenqing Jiang and Chain-Tsuan Liu and Zhongwu Zhang and Liaw, {Peter K.}",

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T1 - Nanoprecipitate-Strengthened High-Entropy Alloys

AU - Liu, Liyuan

AU - Zhang, Yang

AU - Han, Jihong

AU - Wang, Xiyu

AU - Jiang, Wenqing

AU - Liu, Chain-Tsuan

AU - Zhang, Zhongwu

AU - Liaw, Peter K.

PY - 2021/12/8

Y1 - 2021/12/8

N2 - Multicomponent high-entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body-centered-cubic (BCC) or hexagonal-close-packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced-centered-cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate-strengthened HEAs and their strengthening mechanisms. The alloy-design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined.

AB - Multicomponent high-entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body-centered-cubic (BCC) or hexagonal-close-packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced-centered-cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate-strengthened HEAs and their strengthening mechanisms. The alloy-design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined.

KW - alloy design

KW - high-entropy alloys

KW - mechanical properties

KW - nanoprecipitates

KW - precipitation strengthening

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Nanoprecipitate-Strengthened High-Entropy Alloys

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Research Keywords

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