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

doi:10.1557/adv.2017.167

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

ENG - Materials Science

Research output: Contribution to journal › Article › peer-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 MPam^1/2, while the fracture toughness of Al-rich Al3Nb is also evaluated to be 2.82 MPam^1/2. 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 MPam^1/2.The fracture toughness of Al₃Nb is seemingly insensitive to V addition.

Original language	English
Pages (from-to)	1405-1410
Number of pages	6
Journal	MRS Advances
Volume	2
Issue number	26
DOIs	https://doi.org/10.1557/adv.2017.167
Publication status	Published - 2017

Keywords

Compound
Ion-Beam Processing
Nano-Indentation

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10.1557/adv.2017.167

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

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.",

keywords = "Compound, Ion-Beam Processing, Nano-Indentation",

author = "Nobuhiro Matsuzaki and Ikeda, {Ken Ichi} and Seiji Miura and Nobuaki Sekido and Takahito Ohmura",

note = "Funding Information: The authors are grateful to Mr. T. Endo of Hokkaido University for experimental support. This work was supported by the JST-ALCA program, Ultra Heat-Resistant Materials and High Quality Recycled Steel, High temperature materials based on multi-element bcc solid solutions. Publisher Copyright: {\textcopyright} 2017 Materials Research Society.",

year = "2017",

doi = "10.1557/adv.2017.167",

language = "English",

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pages = "1405--1410",

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T1 - The evaluation of the composition dependence of fracture toughness of Al3Nb alloys by using micro-size fracture testing

AU - Matsuzaki, Nobuhiro

AU - Ikeda, Ken Ichi

AU - Miura, Seiji

AU - Sekido, Nobuaki

AU - Ohmura, Takahito

N1 - Funding Information: The authors are grateful to Mr. T. Endo of Hokkaido University for experimental support. This work was supported by the JST-ALCA program, Ultra Heat-Resistant Materials and High Quality Recycled Steel, High temperature materials based on multi-element bcc solid solutions. Publisher Copyright: © 2017 Materials Research Society.

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

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KW - Nano-Indentation

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

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