The evaluation of the composition dependence of fracture toughness of Al3Nb alloys by using micro-size fracture testing

Nobuhiro Matsuzaki, Ken Ichi Ikeda, Seiji Miura, Nobuaki Sekido, Takahito Ohmura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Al3Nb is known as a high oxidation resistant material, while it is quite brittle. As the fracture toughness of Al3Nb single crystal and its dependence on the composition are not obtained, the micro-sized fracture testing proposed by Suzuki et al. was performed. Al3Nb single crystal micron-order size cantilevers with a chevron-notch were fabricated in a grain of two-phase polycrystalline alloys by using FIB (Focused Ion Beam). From the load-displacement curves during the bending by a nanoindenter, the average value of fracture toughness of Nb-rich Al3Nb is evaluated to be 2.90 MPam1/2, while the fracture toughness of Al-rich Al3Nb is also evaluated to be 2.82 MPam1/2. From this result, the fracture toughness of Al3Nb is less dependent on its Al/Nb ratio. Furthermore the fracture toughness of Al3 (Nb, V) was evaluated to be 2.82 MPam1/2.The fracture toughness of Al3Nb is seemingly insensitive to V addition.

Original languageEnglish
Pages (from-to)1405-1410
Number of pages6
JournalMRS Advances
Volume2
Issue number26
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Compound
  • Ion-Beam Processing
  • Nano-Indentation

ASJC Scopus subject areas

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

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