Journal Article

PUBDB-2026-00906

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhanced strength-ductility synergy by integrating metastable and heterostructured design in FeNiCrV alloy

Guan, X. ; Guo, Y.-X. ; Wang, L.-D. ; Jia, N. ; Jiang, S. (Corresponding author)Extern* ; Gan, W. ; Yan, H.-L. (Corresponding author) ; Zuo, L. (Corresponding author)

2026
Pergamon Press Frankfurt, M. [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ijplas.2026.104654

Abstract: Enhancing the strength of metallic materials usually compromises their ductility since bothproperties are intrinsically decided by chemical bond strength but with opposite dependencies.Despite great effort via microstructural regulation, tackling the strength-ductility paradox inmetals and alloys remains a challenge. To achieve superior strength-ductility combination, herewe report an integrated metastable and heterostructured alloy design strategy. Guided by ab-initiothermodynamics and dynamics calculations, a novel metastable Fe68Ni12Cr10V10 (at. %) dualphaseeutectic multicomponent alloy in which the martensitic transformation may occur underdeformation was fabricated. By applying routine thermomechanical processing, a multiheterostructuredmaterial characterized by alternating fcc and bcc lamellae, fully recrystallizedfcc grains and unrecrystallized bcc grains, as well as a bimodal distribution of fcc grains, wasobtained. Yield strength of the material is comparable to that of the high-strength bcc referencealloy, while its ductility also surpasses the ductile fcc reference alloy. By in-situ high-energy X-raydiffraction measurements, the superior strength-ductility synergy was found to originate from thecoupled effects of hetero-deformation induced strengthening and transformation-induced plasticity.Specifically, the high strength is primarily ascribed to the strengthening imparted byalternating soft fcc and hard bcc lamellar structures. The exceptional ductility stems from multistageα'-martensite transformation over a broad strain range, which is unique to the multiheterostructure.The synergistic effects of the heterostructure and the athermal transformationoffer a practical route to endow advanced materials with superior mechanical properties.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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