Effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy

Yoshimasa Takahashi; Junji Sakamoto; Masaki Tanaka; Kenji Higashida; Hiroshi Noguchi

doi:10.1016/j.scriptamat.2010.12.032

Effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy

Yoshimasa Takahashi, Junji Sakamoto, Masaki Tanaka, Kenji Higashida, Hiroshi Noguchi

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy was investigated by cross-sectional electron backscatter diffraction and high-voltage electron microscopy. In contrast to the previously reported results in an inert environment, no dislocation cells were formed around the crack tip in a hydrogen environment. The microscopic features around the crack tip suggest that hydrogen promotes a mode I-type crack growth mechanism, which reasonably explains the observed macroscopic crack growth property.

Original language	English
Pages (from-to)	721-724
Number of pages	4
Journal	Scripta Materialia
Volume	64
Issue number	8
DOIs	https://doi.org/10.1016/j.scriptamat.2010.12.032
Publication status	Published - Apr 2011
Externally published	Yes

Keywords

Crack tip
EBSD
Fatigue
Hydrogen
TEM

ASJC Scopus subject areas

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

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10.1016/j.scriptamat.2010.12.032

Cite this

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title = "Effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy",

abstract = "The effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy was investigated by cross-sectional electron backscatter diffraction and high-voltage electron microscopy. In contrast to the previously reported results in an inert environment, no dislocation cells were formed around the crack tip in a hydrogen environment. The microscopic features around the crack tip suggest that hydrogen promotes a mode I-type crack growth mechanism, which reasonably explains the observed macroscopic crack growth property.",

keywords = "Crack tip, EBSD, Fatigue, Hydrogen, TEM",

author = "Yoshimasa Takahashi and Junji Sakamoto and Masaki Tanaka and Kenji Higashida and Hiroshi Noguchi",

note = "Funding Information: This study has been conducted as a part of “Fundamental Research Project on Advanced Hydrogen Science” funded by the New Energy and Industrial Technology Development Organization (NEDO). The authors are indebted to Mr. T. Daio at the Research Laboratory for HVEM (Kyushu University) for his help with the HVEM observations. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.scriptamat.2010.12.032",

language = "English",

volume = "64",

pages = "721--724",

journal = "Scripta Materialia",

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AU - Takahashi, Yoshimasa

AU - Sakamoto, Junji

AU - Tanaka, Masaki

AU - Higashida, Kenji

AU - Noguchi, Hiroshi

N1 - Funding Information: This study has been conducted as a part of “Fundamental Research Project on Advanced Hydrogen Science” funded by the New Energy and Industrial Technology Development Organization (NEDO). The authors are indebted to Mr. T. Daio at the Research Laboratory for HVEM (Kyushu University) for his help with the HVEM observations. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/4

Y1 - 2011/4

N2 - The effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy was investigated by cross-sectional electron backscatter diffraction and high-voltage electron microscopy. In contrast to the previously reported results in an inert environment, no dislocation cells were formed around the crack tip in a hydrogen environment. The microscopic features around the crack tip suggest that hydrogen promotes a mode I-type crack growth mechanism, which reasonably explains the observed macroscopic crack growth property.

AB - The effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy was investigated by cross-sectional electron backscatter diffraction and high-voltage electron microscopy. In contrast to the previously reported results in an inert environment, no dislocation cells were formed around the crack tip in a hydrogen environment. The microscopic features around the crack tip suggest that hydrogen promotes a mode I-type crack growth mechanism, which reasonably explains the observed macroscopic crack growth property.

KW - Crack tip

KW - EBSD

KW - Fatigue

KW - Hydrogen

KW - TEM

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Effect of hydrogen on dislocation structures around a mixed-mode fatigue crack tip in a single-crystalline iron-silicon alloy

Abstract

Keywords

ASJC Scopus subject areas

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