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, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

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

Link(s)

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 L1phase 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

Citation Format(s)

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, 22, 62)21_Publication in refereed journalpeer-review

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