About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
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Symposium
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5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
Application of High Energy Imaging CT to Investigate Local 3D Short Fatigue Crack Closure Behavior in Ti-6Al-4V Alloy |
Author(s) |
Valary Tubei, Hiroyuki Toda, Kyosuke Hirayama, Meysam Hassanipour, Akihisa Takeuchi, Masayuki Uesugi |
On-Site Speaker (Planned) |
Valary Tubei |
Abstract Scope |
High energy imaging CT has been utilized for the in-situ observation of local 3D short fatigue crack closure behavior in Ti-6Al-4V alloy at SPring-8 synchrotron radiation facility in Japan. In recent years, projection CT with a resolution of ~1 µm has been employed to non-destructively observe crack closure. However, the short crack tip opening displacement is usually below 1µm and thus this technique cannot be used to accurately visualize crack front closure behavior. Recent CT technology advances have led to the achievement of ultra-high resolution imaging that is realized by focusing the high energy X-ray beams using the apodization Fresnel Zone Plate. This imaging CT was utilized in this study with X-ray energy of 30 keV. In combination with the high contrast attained by using the Zernike Phase Plate, the internal microstructure, crack and crack closure occurrence at the crack front were readily visualized at a resolution of 130 nm. |
Proceedings Inclusion? |
Definite: Other |