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

Shiori Suzuki; Nobuaki Sekido; Takahito Ohmura; Seiji Miura

doi:10.1557/opl.2015.147

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 proceeding › Conference contribution

1 Citation (Scopus)

Abstract

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 K_q is 3.45 ± 0.29 MPa√m under a small-scale yielding condition.

Original language	English
Title of host publication	Advanced Structural and Functional Intermetallic-Based Alloys
Editors	I. Baker, M. Heilmaier, K. Kishida, M. Mills, S. Miura
Publisher	Materials Research Society
Pages	187-192
Number of pages	6
ISBN (Electronic)	9781510806344
DOIs	https://doi.org/10.1557/opl.2015.147
Publication status	Published - 2015 Jan 1
Externally published	Yes
Event	2014 MRS Fall Meeting - Boston, United States Duration: 2014 Nov 30 → 2014 Dec 5

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1760
ISSN (Print)	0272-9172

Other

Other	2014 MRS Fall Meeting
Country	United States
City	Boston
Period	14/11/30 → 14/12/5

ASJC Scopus subject areas

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

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10.1557/opl.2015.147

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Suzuki, S., Sekido, N., Ohmura, T., & Miura, S. (2015). Evaluation of fracture toughness of alpha-Nb₅Si₃ by micro-sized cantilever beam testing. In I. Baker, M. Heilmaier, K. Kishida, M. Mills, & S. Miura (Eds.), Advanced Structural and Functional Intermetallic-Based Alloys (pp. 187-192). (Materials Research Society Symposium Proceedings; Vol. 1760). Materials Research Society. https://doi.org/10.1557/opl.2015.147

Evaluation of fracture toughness of alpha-Nb₅Si₃ by micro-sized cantilever beam testing. / Suzuki, Shiori; Sekido, Nobuaki; Ohmura, Takahito; Miura, Seiji.

Advanced Structural and Functional Intermetallic-Based Alloys. ed. / I. Baker; M. Heilmaier; K. Kishida; M. Mills; S. Miura. Materials Research Society, 2015. p. 187-192 (Materials Research Society Symposium Proceedings; Vol. 1760).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Suzuki, S, Sekido, N, Ohmura, T & Miura, S 2015, Evaluation of fracture toughness of alpha-Nb₅Si₃ by micro-sized cantilever beam testing. in I Baker, M Heilmaier, K Kishida, M Mills & S Miura (eds), Advanced Structural and Functional Intermetallic-Based Alloys. Materials Research Society Symposium Proceedings, vol. 1760, Materials Research Society, pp. 187-192, 2014 MRS Fall Meeting, Boston, United States, 14/11/30. https://doi.org/10.1557/opl.2015.147

Suzuki S, Sekido N, Ohmura T, Miura S. Evaluation of fracture toughness of alpha-Nb₅Si₃ by micro-sized cantilever beam testing. In Baker I, Heilmaier M, Kishida K, Mills M, Miura S, editors, Advanced Structural and Functional Intermetallic-Based Alloys. Materials Research Society. 2015. p. 187-192. (Materials Research Society Symposium Proceedings). https://doi.org/10.1557/opl.2015.147

Suzuki, Shiori ; Sekido, Nobuaki ; Ohmura, Takahito ; Miura, Seiji. / Evaluation of fracture toughness of alpha-Nb₅Si₃ by micro-sized cantilever beam testing. Advanced Structural and Functional Intermetallic-Based Alloys. editor / I. Baker ; M. Heilmaier ; K. Kishida ; M. Mills ; S. Miura. Materials Research Society, 2015. pp. 187-192 (Materials Research Society Symposium Proceedings).

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abstract = "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.",

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