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Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography
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| Title: | Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography |
| Authors: | Xue, Gaoge Browse this author | | Nakamura, Takashi Browse this author →KAKEN DB | | Fujimura, Nao Browse this author →KAKEN DB | | Takahashi, Kosuke Browse this author | | Oguma, Hiroyuki Browse this author →KAKEN DB | | Takeuchi, Akihisa Browse this author | | Uesugi, Masayuki Browse this author | | Uesugi, Kentaro Browse this author |
| Keywords: | Non-destructive inspection | | Crack initiation | | Small-crack growth | | Beta titanium | | Nanotomography |
| Issue Date: | 15-Mar-2022 |
| Publisher: | Elsevier |
| Journal Title: | Engineering Fracture Mechanics |
| Volume: | 263 |
| Start Page: | 108308 |
| Publisher DOI: | 10.1016/j.engfracmech.2022.108308 |
| Abstract: | 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. |
| Rights: | © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/91130 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中村 孝
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