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

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

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Original languageEnglish
Pages (from-to)575-584
Journal / PublicationMaterials Research Letters
Volume10
Issue number9
Online published3 May 2022
Publication statusPublished - 2022

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  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-85129684218&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(5a4c2f0e-d8b0-4a0c-8a87-c59c4f788bdb).html

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.

Research Area(s)

  • 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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Multi-Principal Ele... Material Science
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Density Material Science
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Ultimate Tensile St... Material Science
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Age Hardening Material Science
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Selective Laser Mel... Material Science
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Citation Format(s)

[ RIS ] [ BibTeX ]
Dual heterogeneous structure facilitating an excellent strength-ductility combination in an additively manufactured multi-principal-element alloy. / Huang, Jing; Li, Wanpeng; He, Junyang et al.
In: Materials Research Letters, Vol. 10, No. 9, 2022, p. 575-584.

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

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