Laminated Ti-Al composites: Processing, structure and strength

Yan Du, Guohua Fan, Tianbo Yu, Niels Hansen, Lin Geng, Xiaoxu Huang

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Abstract

Laminated Ti-Al composite sheets with different layer thickness ratios have been fabricated through hot pressing followed by multi-pass hot rolling at 500 °C.The laminated sheets show strong bonding with intermetallic interface layers of nanoscale thickness between the layers of Ti and Al. The mechanical properties of the composites with different volume fractions of Al from 10% to 67% show a good combination of strength and ductility. A constraint strain in the hot-rolled laminated structure between the hard and soft phases introduces an elastic-plastic deformation stage, which becomes more pronounced as the volume fraction of Al decreases. Moreover, the thin intermetallic interface layer may also contribute to the strength of the composites, and this effect increases with increasing volume fraction of the interface layer.
Original languageEnglish
JournalMaterials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
Volume673
Pages (from-to)572-580
ISSN0921-5093
DOIs
Publication statusPublished - 2016

Keywords

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials
  • Composites
  • Electron microscopy
  • Interfaces
  • Mechanical characterization
  • Thermomechanical processing
  • Composite materials
  • Elastoplasticity
  • Hot pressing
  • Hot rolling
  • Interfaces (materials)
  • Laminated composites
  • Laminating
  • MOS devices
  • Volume fraction
  • Elastic-plastic deformation
  • Intermetallic interface
  • Laminated structures
  • Mechanical characterizations
  • Multi-pass hot rollings
  • Nanoscale thickness
  • Strength and ductilities
  • Thermo-mechanical processing
  • Aluminum

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