Evaluation of fracture toughness of alpha-Nb5Si3 by micro-sized cantilever beam testing

Shiori Suzuki, Nobuaki Sekido, Takahito Ohmura, Seiji Miura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


A micro-sized fracture testing method has been applied to investigate fracture toughness of alpha-Nb5Si3. Chevron-notched single crystal specimens with a size of 3 × 3 × 15 μm3 were prepared in a grain of polycrystalline alpha-Nb5Si3 by focused ion beam, FIB, technique. Fracture tests were conducted using a nanoindenter at room temperature and linear load-displacement curves and smooth fracture surfaces were obtained. This fracture behavior was presumed to be brittle fracture similar to bulk alpha-Nb5Si3. The average of fracture toughness Kq is 3.45 ± 0.29 MPa√m under a small-scale yielding condition.

Original languageEnglish
Title of host publicationAdvanced Structural and Functional Intermetallic-Based Alloys
EditorsI. Baker, M. Heilmaier, K. Kishida, M. Mills, S. Miura
PublisherMaterials Research Society
Number of pages6
ISBN (Electronic)9781510806344
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event2014 MRS Fall Meeting - Boston, United States
Duration: 2014 Nov 302014 Dec 5

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2014 MRS Fall Meeting
Country/TerritoryUnited States

ASJC Scopus subject areas

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


Dive into the research topics of 'Evaluation of fracture toughness of alpha-Nb5Si3 by micro-sized cantilever beam testing'. Together they form a unique fingerprint.

Cite this