Interfacial characteristics and fracture behavior of spark-plasma-sintered TiNi fiber-reinforced 2024Al matrix composites

Peng Dong, Zhe Wang, Wenxian Wang, Shaoping Chen, Jun Zhou

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Abstract

Embedding of shape memory alloy (SMA) fibers into materials to fabricate SMA composites has attracted considerable attention because of the potential applicability of these composites in smart systems and structures. In this study, 2024Al matrix composites reinforced by continuous TiNi SMA fibers were fabricated using spark plasma sintering (SPS). The interface between the fibers and matrix consisted of a bilayer. The layer close to the fiber consisted of a multiple phase mixture, and the other layer exhibited a periodic morphology resulting from the alternating phases of Al3Ti and Al3Ni. In addition, a small quantity of TiO2phases was also observed in the interface layer. Based on detailed interface studies of the orientation relationships between the Al3Ti, Al3Ni, and TiO2phases and the atomic correspondence at phase boundaries, the effects of the interface phases on the fracture behavior of the composites were demonstrated.

Original languageEnglish (US)
Pages (from-to)141-149
Number of pages9
JournalMaterials Science and Engineering A
Volume691
DOIs
StatePublished - Apr 13 2017

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All Science Journal Classification (ASJC) codes

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

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