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 journalArticlepeer-review

5 Scopus citations

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

Keywords

  • graphene
  • nanocomposites
  • selective laser melting

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Bulk titanium-graphene nanocomposites fabricated by selective laser melting'. Together they form a unique fingerprint.

Cite this