Bulk titanium-graphene nanocomposites fabricated by selective laser melting

Zengrong Hu, Dini Wang, Changjun Chen, Xiaonan Wang, Xiaming Chen, Qiong Nian

    Research output: Contribution to journalArticle

    Abstract

    In this report, bulk graphene-reinforced titanium (Ti-Gr) nanocomposite with millimeter thickness was fabricated by selective laser melting process. Demonstrated by the characterizations of scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectra, graphene nanoplatelets were successfully embedded into the titanium matrix with a uniform dispersion due to a fast heating-cooling process. High-resolution transmission electron microscopy was used to investigate the interface between titanium and graphene, where a certain amount of carbide was formed attribute to the chemical reaction between them during multilayer laser melting. A high density of dislocations was observed surrounding the graphene nanoplatelets in titanium matrix. The strength and elastic modulus of the nanocomposites were significantly improved, which has been demonstrated by nano-indentation tests. The hardness of the bulk Ti-Gr nanocomposites was approximately 1.27 times higher than pristine Ti counterpart. The strengthening mechanisms were discussed in detail.

    Original languageEnglish (US)
    JournalJournal of Materials Research
    DOIs
    StatePublished - Jan 1 2019

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    Graphite
    Titanium
    Graphene
    Nanocomposites
    nanocomposites
    graphene
    Melting
    titanium
    melting
    Lasers
    lasers
    Nanoindentation
    matrices
    High resolution transmission electron microscopy
    nanoindentation
    carbides
    Carbides
    Raman scattering
    Energy dispersive spectroscopy
    Chemical reactions

    Keywords

    • graphene
    • nanocomposites
    • selective laser melting

    ASJC Scopus subject areas

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

    Cite this

    Bulk titanium-graphene nanocomposites fabricated by selective laser melting. / Hu, Zengrong; Wang, Dini; Chen, Changjun; Wang, Xiaonan; Chen, Xiaming; Nian, Qiong.

    In: Journal of Materials Research, 01.01.2019.

    Research output: Contribution to journalArticle

    Hu, Zengrong ; Wang, Dini ; Chen, Changjun ; Wang, Xiaonan ; Chen, Xiaming ; Nian, Qiong. / Bulk titanium-graphene nanocomposites fabricated by selective laser melting. In: Journal of Materials Research. 2019.
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