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Preparation of graphene film reinforced CoCrFeNiMn high-entropy alloy matrix composites with strength-plasticity synergy via flake powder metallurgy method

Liu, Chongyang; Jiang, Xiaosong; Sun, Hongliang; Liu, Tianyan; Wu, Zixuan; Yang, Liu 1
1 Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Karlsruher Institut für Technologie (KIT)

Abstract:

Inspired by the design principle of pearl structure, a bottom-up flake powder self-assembly arrangement strategy, flake powder metallurgy, is used to prepare graphene films (GFs) reinforced CoCrFeNiMn high-entropy alloy (HEA) matrix composites with a pearl laminated structure. Flaky HEA powder was prepared by ball milling method and homogeneously mixed with Ni plated GFs. Vacuum hot-press sintering (VHPS) technique was carried out to solidify the mixed powders to obtain composites with uniform distribution of GFs(Ni) and flaky HEA. The results show that the bottom-up preparation strategy can effectively fabricate bionic laminated HEA matrix composites, and the composites have a distinct pearly laminated structure. The tensile strength of the composites with 5 vol% GFs(Ni) content reached 834.04 MPa, and the elongation reached 26.58 %. The compressive strength in parallel and perpendicular laminar directions reached 2069.66 MPa and 2418.45 MPa at 50 % strain, respectively. The laminated GFs(Ni)/HEA matrix composites possessed excellent strength and maintained good plasticity. In this study, the strengthening and toughening mechanism of the laminated GFs(Ni)/HEA matrix composites is discussed in detail, and the results show that the laminated structure and GFs(Ni) are favorable for the hardening and strengthening of the HEA matrix.


Verlagsausgabe §
DOI: 10.5445/IR/1000165785
Veröffentlicht am 03.01.2024
Originalveröffentlichung
DOI: 10.1016/j.jmrt.2023.11.182
Scopus
Zitationen: 6
Web of Science
Zitationen: 2
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2023
Sprache Englisch
Identifikator ISSN: 2238-7854, 2214-0697
KITopen-ID: 1000165785
Erschienen in Journal of Materials Research and Technology
Verlag Elsevier
Band 27
Seiten 7614 – 7626
Schlagwörter High entropy alloy, Laminated structure, Graphene film, Strength-plasticity synergy, Strengthening mechanism
Nachgewiesen in Scopus
Web of Science
Dimensions
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