Nanocrystalline Mg-MAX composites: Mechanical behavior characterization via acoustic emission monitoring

Antonios Kontsos, Theodoros Loutas, Vassilis Kostopoulos, Kavan Hazeli, Babak Anasori, Michel W. Barsoum

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

This paper reports on the mechanical behavior characterization of a nanocrystalline Mg-matrix composite reinforced with Ti2AlC by using the acoustic emission (AE) method. When Mg is reinforced with Ti2AlC, the damping is greatly enhanced and, because the Mg grains are in the 50-100 nm range, the resulting composite has excellent mechanical properties. Monotonic and cyclic tensile, as well as low-cycle fatigue tests were carried out while simultaneously recording the AE activity. The latter was analyzed post-mortem and was additionally coupled with advanced pattern recognition techniques for classification and clustering of the AE signals. The results provide evidence related to the activation and evolution of a possibly novel deformation mechanism in this nanocomposite, and are further found to agree with previously reported theoretical and experimental findings.

Original languageEnglish (US)
Pages (from-to)5716-5727
Number of pages12
JournalActa Materialia
Volume59
Issue number14
DOIs
StatePublished - Aug 2011
Externally publishedYes

Keywords

  • Acoustic methods
  • Fatigue test
  • Magnesium
  • Mechanical properties
  • Nanocrystalline materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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