Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography

Xue, Gaoge; Nakamura, Takashi; Fujimura, Nao; Takahashi, Kosuke; Oguma, Hiroyuki; Takeuchi, Akihisa; Uesugi, Masayuki; Uesugi, Kentaro

Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography

Xue, Gaoge; Nakamura, Takashi; Fujimura, Nao et al.

Engineering Fracture Mechanics, 2022, 263, 108308

Permalink : https://hdl.handle.net/2115/91130

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アクセス権	open access
URI	https://hdl.handle.net/2115/91130
タイトル	Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography
著者	Xue, Gaoge ; Nakamura, Takashi ; Fujimura, Nao ; Takahashi, Kosuke ; Oguma, Hiroyuki ; Takeuchi, Akihisa ; Uesugi, Masayuki ; Uesugi, Kentaro
著者名 Xue, Gaoge
e-Rad_Researcher 30237408 著者名 Nakamura, Takashi
e-Rad_Researcher 40732988 著者名 Fujimura, Nao
著者名 Takahashi, Kosuke
e-Rad_Researcher 10342734 著者名 Oguma, Hiroyuki
著者名 Takeuchi, Akihisa
著者名 Uesugi, Masayuki
著者名 Uesugi, Kentaro
言語	英語
キーワード	Non-destructive inspection
	Crack initiation
	Small-crack growth
	Beta titanium
	Nanotomography
発行日	2022-03-15
出版者	Elsevier
収録物名	Engineering Fracture Mechanics
巻(号)	263
ページ	108308
抄録	Synchrotron radiation computed tomography is an emerging nondestructive method for fracture analysis in materials. Herein, the in situ small-crack growth of a beta titanium alloy, Ti-22V-4Al, was monitored by a combination of microtomography (micro-CT) and nanotomography (nano CT). The 3D characteristics of small cracks and the corresponding stress intensity factor range (AK) were obtained by micro-CT; the cracks initiated at _*_10% fatigue life. In the low-AK regime, the scatter of the crack aspect ratio and the deviation in the crack propagation rate were significant; however, they decreased with increasing AK, reflecting the microstructural effect on small-crack propagation. The microstructure of the beta titanium alloy was successfully visualized by nano-CT. Consequently, the crack-surrounding-microstructure interactions evidenced that the fatigue cracks initiated from the center of the beta grain wherein the alpha-phase was less precipitated.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
PISSN	0013-7944
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.engfracmech.2022.108308