Mechanically strong, stiff, and yet ductile AlSi7Mg/graphene composites by laser metal deposition additive manufacturing

Pengxu Li, Rui Cai, Guang Yang, Tianqing Wang, Sensen Han, Shuocheng Zhang, Wei Wang, Qingshi Meng

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)
    79 Downloads (Pure)

    Abstract

    Laser metal deposition (LMD) with a coaxial powder feeding technology has been applied to fabricate pure aluminum alloy (AlSi7Mg) and low oxidation graphene aluminum matrix (LOG-Al) composites with low oxidation graphene (LOG) contents of 0.05wt. % and 0.1wt. % after the powder was prepared by wet ball milling. The LOG-Al composites showed improvements in all properties including hardness, tensile strength, ductility, modulus of elasticity and yield strength with the increase of LOG addition contents. The microstructures and fracture surfaces of the composites were observed and the results of TEM, HRTEM, optical microscope, EBSD, XRD spectra, Raman spectra, Vickers hardness, tensile properties were analyzed. The effects of wet ball milling, the addition of low oxidation graphene and its contents and LMD process on microstructure formation and resulting mechanical properties were discussed.
    Original languageEnglish
    Article number141749
    Number of pages12
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Volume823
    Early online date21 Jul 2021
    DOIs
    Publication statusPublished - 17 Aug 2021

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Properties, Microstructure and Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Properties, Microstructure and Processing, 823, (2021) DOI: 10.1016/j.msea.2021.141749

    © 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Funder

    This work was financially supported by the Open Fund of Key Laboratory of Fundamental Science for Aeronautical Digital Manufacturing Process of Shenyang Aerospace University ( SHSYS201905 ) and the plan of rejuvenating the Talents of Liaoning Province, China ( XLYC1907135 ).

    Keywords

    • Additive manufacturing (AM)
    • Aluminum matrix composites (AMCs)
    • Graphene oxide
    • Laser metal deposition (LMD)

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • Materials Science(all)

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