Plastic deformation sequence and strain gradient characteristics of hydrogen-induced delayed crack propagation in single-crystalline Fe–Si alloy

Microscopic features of hydrogen-induced delayed crack propagation in a thin sheet of single-crystalline Fe-3wt%Si alloy were investigated. The crack tip plastic deformation associated with the effect of hydrogen during the crack propagation leaves three adjacent regions where different plastic stra...

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Bibliographic Details
Published inScripta materialia Vol. 178; pp. 99 - 103
Main Authors Huynh, Thanh Thuong, Koyama, Motomichi, Takahashi, Yoshimasa, Hamada, Shigeru, Tsuzaki, Kaneaki, Noguchi, Hiroshi
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2020
Subjects
Crack propagation
Delayed fracture
Hydrogen
Steel
Delayed fracture
Steel
Hydrogen
Crack propagation
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Summary:Microscopic features of hydrogen-induced delayed crack propagation in a thin sheet of single-crystalline Fe-3wt%Si alloy were investigated. The crack tip plastic deformation associated with the effect of hydrogen during the crack propagation leaves three adjacent regions where different plastic strain gradients and dislocation densities are observed. These regions revealed the effects of plastic deformation and hydrogen-dislocations interaction around the crack tip on the rate-limiting process of hydrogen-induced delayed crack propagation in thin specimens. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2019.11.012