Journal Article

PUBDB-2026-00503

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Co-free Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ multi-principal element alloy with heterogeneous structure and excellent strength-ductility combination

Peng, S. ; Jiang, Z. (Corresponding author) ; Wang, Z. ; Liu, J. ; Zhu, G. (Corresponding author)Extern*DESY* ; Liu, Y. ; Song, Z. ; Zhu, D. (Corresponding author)

2025
Elsevier Lausanne

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Please use a persistent id in citations: doi:10.1016/j.jallcom.2025.179563

Abstract: This study investigates a cost-effective, cobalt-free Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ multi-principal element alloy, based on the most studied AlCoCrFeNi alloy system. The alloy underwent thermal mechanical treatment to induce partial recrystallization, resulting in a multi-phase, multi-scale heterogeneous microstructure. After cold rolling the Al$_{0.5}$CrNi$_{1.5}$Fe$_2$ alloy to 80 % reduction and annealing at 800°C for 1 hour, a heterogeneous structure predominantly consisting of “fine-grained recrystallized regions and nano-grained un-recrystallized regions” was formed. The phase compositions of both regions included a disordered FCC matrix and dispersed ordered BCC (B2) precipitates enriched in Al and Ni, as well as disordered BCC precipitates enriched in Fe and Cr. The alloy exhibited a yield strength of 1035 MPa and an elongation of 20.8 %. Compared to its as-cast counterpart, the elongation decreased slightly, while the yield strength increased by 238 %, achieving an excellent combination of high strength, high ductility, and low cost. Cyclic tensile testing revealed that the heterogeneous deformation-induced stress, driven by the heterogeneous microstructure, accounted for over 49 % of the flow stress. This stress, representing the dominant strengthening mechanism, plays a crucial role in maintaining both high strength and ductility in this Co-free alloy.

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Contributing Institute(s):

1. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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

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