An evaluation of fatigue crack initiation in Ti–6Al–4V alloy by Schmid factor

Jinta Arakawa; Hiroki Sato; Ryosuke Handa; Yukihiko Kimura; Shotaro Hashimoto; Hiroyuki Akebono; Atsushi Sugeta

doi:10.1080/02670836.2022.2127982

An evaluation of fatigue crack initiation in Ti–6Al–4V alloy by Schmid factor

Jinta Arakawa, Hiroki Sato, Ryosuke Handa, Yukihiko Kimura, Shotaro Hashimoto, Hiroyuki Akebono, Atsushi Sugeta

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

Abstract

A plane bending fatigue test was conducted on Ti–6Al–4V, and the crystal grains where the fatigue crack initiated were identified from the crystal orientation map obtained by using the EBSD method. In addition, the slip system, which generated the fatigue crack initiation, was identified by calculating the out-of-plane component of the Schmid factor (SF) of each slip system. As a result, fatigue cracks were found to occur owing to basal slip. In this study, the out-of-plane component of the SF was mapped by considering the effect of the crystal grain size. The results clarified that the number of crystal grains where fatigue crack may initiate can be limited by using the out-of-plane component of the SF and the grain size.

Original language	English
Journal	Materials Science and Technology (United Kingdom)
DOIs	https://doi.org/10.1080/02670836.2022.2127982
Publication status	Accepted/In press - 2022

Keywords

electron backscatter diffraction
fatigue crack initiation
Schmid factor
Ti–6Al–4V alloy

ASJC Scopus subject areas

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

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10.1080/02670836.2022.2127982

Cite this

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title = "An evaluation of fatigue crack initiation in Ti–6Al–4V alloy by Schmid factor",

abstract = "A plane bending fatigue test was conducted on Ti–6Al–4V, and the crystal grains where the fatigue crack initiated were identified from the crystal orientation map obtained by using the EBSD method. In addition, the slip system, which generated the fatigue crack initiation, was identified by calculating the out-of-plane component of the Schmid factor (SF) of each slip system. As a result, fatigue cracks were found to occur owing to basal slip. In this study, the out-of-plane component of the SF was mapped by considering the effect of the crystal grain size. The results clarified that the number of crystal grains where fatigue crack may initiate can be limited by using the out-of-plane component of the SF and the grain size.",

keywords = "electron backscatter diffraction, fatigue crack initiation, Schmid factor, Ti–6Al–4V alloy",

author = "Jinta Arakawa and Hiroki Sato and Ryosuke Handa and Yukihiko Kimura and Shotaro Hashimoto and Hiroyuki Akebono and Atsushi Sugeta",

note = "Publisher Copyright: {\textcopyright} 2022 Institute of Materials, Minerals and Mining.",

year = "2022",

doi = "10.1080/02670836.2022.2127982",

language = "English",

journal = "Metal Science J",

issn = "0267-0836",

publisher = "Maney Publishing",

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TY - JOUR

T1 - An evaluation of fatigue crack initiation in Ti–6Al–4V alloy by Schmid factor

AU - Arakawa, Jinta

AU - Sato, Hiroki

AU - Handa, Ryosuke

AU - Kimura, Yukihiko

AU - Hashimoto, Shotaro

AU - Akebono, Hiroyuki

AU - Sugeta, Atsushi

PY - 2022

Y1 - 2022

N2 - A plane bending fatigue test was conducted on Ti–6Al–4V, and the crystal grains where the fatigue crack initiated were identified from the crystal orientation map obtained by using the EBSD method. In addition, the slip system, which generated the fatigue crack initiation, was identified by calculating the out-of-plane component of the Schmid factor (SF) of each slip system. As a result, fatigue cracks were found to occur owing to basal slip. In this study, the out-of-plane component of the SF was mapped by considering the effect of the crystal grain size. The results clarified that the number of crystal grains where fatigue crack may initiate can be limited by using the out-of-plane component of the SF and the grain size.

AB - A plane bending fatigue test was conducted on Ti–6Al–4V, and the crystal grains where the fatigue crack initiated were identified from the crystal orientation map obtained by using the EBSD method. In addition, the slip system, which generated the fatigue crack initiation, was identified by calculating the out-of-plane component of the Schmid factor (SF) of each slip system. As a result, fatigue cracks were found to occur owing to basal slip. In this study, the out-of-plane component of the SF was mapped by considering the effect of the crystal grain size. The results clarified that the number of crystal grains where fatigue crack may initiate can be limited by using the out-of-plane component of the SF and the grain size.

KW - electron backscatter diffraction

KW - fatigue crack initiation

KW - Schmid factor

KW - Ti–6Al–4V alloy

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U2 - 10.1080/02670836.2022.2127982

DO - 10.1080/02670836.2022.2127982

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SN - 0267-0836

JO - Metal Science J

JF - Metal Science J

ER -

An evaluation of fatigue crack initiation in Ti–6Al–4V alloy by Schmid factor

Abstract

Keywords

ASJC Scopus subject areas

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