Dual heterogeneous structure facilitating an excellent strength-ductility combination in an additively manufactured multi-principal-element alloy

Jing Huang; Wanpeng Li; Junyang He; Rui Zhou; Tzu-Hsiu Chou; Tao Yang; Chain-Tsuan Liu; Weidong Zhang; Yong Liu; Jacob C. Huang

doi:10.1080/21663831.2022.2067790

Dual heterogeneous structure facilitating an excellent strength-ductility combination in an additively manufactured multi-principal-element alloy

Jing Huang, Wanpeng Li, Junyang He, Rui Zhou, Tzu-Hsiu Chou, Tao Yang, Chain-Tsuan Liu, Weidong Zhang, Yong Liu^*, Jacob C. Huang^*

^*Corresponding author for this work

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

49 Citations (Scopus)

93 Downloads (CityUHK Scholars)

Abstract

The (FeCoNi)₈₆Ti₇Al₇ multi-principal-element alloy with a dual heterogeneous microstructure was successfully fabricated by selective laser melting, exhibiting an excellent combination of strength (ultimate tensile strength, 1085.2 ± 23.2 MPa) and ductility (30.5 ± 2.6%). It is evidenced that the joint effects of the hetero-deformation induced hardening from grains with heterogeneous geometrically necessary dislocations densities, in-situ formed B2 phase, and the coherent precipitation hardening from in-situ formed nano L1₂phase were responsible for the strength. This work sheds light on the feasibility of simplifying the production of multi-mechanism strengthened alloys within one step and paves a new avenue to produce high-performance complex-shaped components.

Original language	English
Pages (from-to)	575-584
Journal	Materials Research Letters
Volume	10
Issue number	9
Online published	3 May 2022
DOIs	https://doi.org/10.1080/21663831.2022.2067790
Publication status	Published - 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Additive manufacturing
multi-principal-element alloy
dual heterogeneous microstructure
mechanical properties
hetero-deformation induced hardening
HIGH-ENTROPY ALLOY
PRECIPITATION BEHAVIOR
BACK STRESS
MICROSTRUCTURE
ULTRASTRONG
ORIGIN
STEEL
DISLOCATION

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abstract = "The (FeCoNi)86Ti7Al7 multi-principal-element alloy with a dual heterogeneous microstructure was successfully fabricated by selective laser melting, exhibiting an excellent combination of strength (ultimate tensile strength, 1085.2 ± 23.2 MPa) and ductility (30.5 ± 2.6%). It is evidenced that the joint effects of the hetero-deformation induced hardening from grains with heterogeneous geometrically necessary dislocations densities, in-situ formed B2 phase, and the coherent precipitation hardening from in-situ formed nano L12 phase were responsible for the strength. This work sheds light on the feasibility of simplifying the production of multi-mechanism strengthened alloys within one step and paves a new avenue to produce high-performance complex-shaped components.",

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author = "Jing Huang and Wanpeng Li and Junyang He and Rui Zhou and Tzu-Hsiu Chou and Tao Yang and Chain-Tsuan Liu and Weidong Zhang and Yong Liu and Huang, {Jacob C.}",

year = "2022",

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T1 - Dual heterogeneous structure facilitating an excellent strength-ductility combination in an additively manufactured multi-principal-element alloy

AU - Huang, Jing

AU - Li, Wanpeng

AU - He, Junyang

AU - Zhou, Rui

AU - Chou, Tzu-Hsiu

AU - Yang, Tao

AU - Liu, Chain-Tsuan

AU - Zhang, Weidong

AU - Liu, Yong

AU - Huang, Jacob C.

PY - 2022

Y1 - 2022

N2 - The (FeCoNi)86Ti7Al7 multi-principal-element alloy with a dual heterogeneous microstructure was successfully fabricated by selective laser melting, exhibiting an excellent combination of strength (ultimate tensile strength, 1085.2 ± 23.2 MPa) and ductility (30.5 ± 2.6%). It is evidenced that the joint effects of the hetero-deformation induced hardening from grains with heterogeneous geometrically necessary dislocations densities, in-situ formed B2 phase, and the coherent precipitation hardening from in-situ formed nano L12 phase were responsible for the strength. This work sheds light on the feasibility of simplifying the production of multi-mechanism strengthened alloys within one step and paves a new avenue to produce high-performance complex-shaped components.

AB - The (FeCoNi)86Ti7Al7 multi-principal-element alloy with a dual heterogeneous microstructure was successfully fabricated by selective laser melting, exhibiting an excellent combination of strength (ultimate tensile strength, 1085.2 ± 23.2 MPa) and ductility (30.5 ± 2.6%). It is evidenced that the joint effects of the hetero-deformation induced hardening from grains with heterogeneous geometrically necessary dislocations densities, in-situ formed B2 phase, and the coherent precipitation hardening from in-situ formed nano L12 phase were responsible for the strength. This work sheds light on the feasibility of simplifying the production of multi-mechanism strengthened alloys within one step and paves a new avenue to produce high-performance complex-shaped components.

KW - Additive manufacturing

KW - multi-principal-element alloy

KW - dual heterogeneous microstructure

KW - mechanical properties

KW - hetero-deformation induced hardening

KW - HIGH-ENTROPY ALLOY

KW - PRECIPITATION BEHAVIOR

KW - BACK STRESS

KW - MICROSTRUCTURE

KW - ULTRASTRONG

KW - ORIGIN

KW - STEEL

KW - DISLOCATION

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DO - 10.1080/21663831.2022.2067790

M3 - RGC 21 - Publication in refereed journal

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EP - 584

JO - Materials Research Letters

JF - Materials Research Letters

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ER -

Dual heterogeneous structure facilitating an excellent strength-ductility combination in an additively manufactured multi-principal-element alloy

Abstract

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Research Keywords

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