Výsledky vyhledávání - "Tomomi Ohgaki"

Three-dimensional visualization of ductile fracture in an Al–Si alloy by high-resolution synchrotron X-ray microtomography

Autor: Tomomi Ohgaki, Lihe Qian, Masakazu Kobayashi, Kentaro Uesugi, Toshiro Kobayashi, Hiroyuki Toda

Publikováno v: Materials Science and Engineering: A. :293-296

A direct three-dimensional visualization of the ductile fracture process under monotonic loading, in an Al–Si–Mg alloy specimen containing a fatigue pre-crack, has been conducted by means of the high-resolution X-ray computed tomography. Differen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7007db811304eba90f1311014b0ed3b2
https://doi.org/10.1016/j.msea.2006.10.201

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Three-Dimensional Zinc Mapping inside Aluminum Foams Using Synchrotron X-Ray Microtomography

Autor: Kentaro Uesugi, Hiroyuki Toda, Toshiro Kobayashi, Yasuhiro Aruga, Koichi Makii, Yume Suzuki, Y. Takami, Toshiaki Takagi, Tomomi Ohgaki

Publikováno v: Materials Science Forum. :1677-1680

Three-dimensional zinc mapping based on X-ray K-edge scanning has been performed. By microtomographies with energies above and below the K-absorption edges of the elements, the concentration distribution of the elements is evaluated during in-situ ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a190393523ce4597622658c71d052306
https://doi.org/10.4028/www.scientific.net/msf.561-565.1677

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Three-Dimensional Measurement of Local Strain Distribution by Tracking Microstructural Features in High-Resolution SR-CT Image

Autor: Masakazu Kobayashi, Hiroyuki Toda, Tomomi Ohgaki, Kentaro Uesugi, David S. Wilkinson, Toshiro Kobayashi, Yoshimitsu Aoki

Publikováno v: Key Engineering Materials. :1153-1156

The local elastic and plastic strain during deformation are very complicated and different form the macroscopic strain, because most materials have inhomogeneous microstructure. In this study, local strain distribution in three dimensions has been me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a6b897161edf89c1fbbb029a7158c6b
https://doi.org/10.4028/www.scientific.net/kem.345-346.1153

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3-D High-Density Strain Mapping Procedure Based on High-Resolution CT

Autor: Toshiro Kobayashi, Yuji Kawai, Masakazu Kobayashi, Hiroyuki Toda, Yoshimitsu Aoki, Kentaro Uesugi, David Wilkinson, Tomomi Ohgaki

Publikováno v: Materials Science Forum. :2377-2382

A tracking procedure for the high-resolution X-ray computed tomography (CT) has been developed in order to measure 3-D local strain within a deforming material in high-density. A dispersion-strengthened copper alloy model sample with alumina particle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df00a1e3430ee7293447f8808bca80b8
https://doi.org/10.4028/www.scientific.net/msf.539-543.2377

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Application of Local Tomography Technique to High-Resolution Synchrotron X-Ray Imaging

Autor: Toshiro Kobayashi, Yasuhiro Aruga, Kentaro Uesugi, Toshiaki Takagi, Koichi Makii, Tomomi Ohgaki, Hiroyuki Toda

Publikováno v: Materials Science Forum. :287-292

X-ray CT method is a kind of nondestructive inspection, but has strong limitation in sample size due to a small field of view (FOV). The higher the resolution, the smaller FOV is, mainly due to the element number of available detectors commercially.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f6d1c63830597100f1dd0ffcc75a30d
https://doi.org/10.4028/www.scientific.net/msf.539-543.287

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In situobservations of compressive behaviour of aluminium foams by local tomography using high-resolution X-rays

Autor: T. Kobayash, Tomomi Ohgaki, Kentaro Uesugi, Hiroyuki Toda, Mitsuo Niinomi, Toshikazu Akahori, Koichi Makii, Masakazu Kobayashi, Yasuhiro Aruga

Publikováno v: Philosophical Magazine. 86:4417-4438

We have investigated the compressive behaviour of closed-cell aluminium foams using a high-resolution X-ray CT. The microstructures of cell walls or Plateau borders in the foams were visualized in ...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1cc8e7071f2b677fbaaba9b78c815f5b
https://doi.org/10.1080/14786430600724454

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Preferential penetration path of gallium into grain boundary in practical aluminium alloy

Autor: Yoshimasa Takayama, Masakazu Kobayashi, Hiroyuki Toda, Toshiro Kobayashi, B.-G. Ahn, Kentaro Uesugi, Tomomi Ohgaki

Publikováno v: Philosophical Magazine. 86:4351-4366

The preferential penetration of a liquid metal along grain boundaries (GBs) in polycrystalline metals is a well-known phenomenon. Gallium-decorated GB networks in rolled aluminium alloys have been visualized three-dimensionally using the high-resolut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2522613556664a59e6f767ef6a4034a6
https://doi.org/10.1080/14786430600710933

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Assessment of Damage and Fracture Behaviours in a Cast Aluminium Alloy via In Situ Synchrotron Microtomography

Autor: Kentaro Uesugi, Lihe Qian, Masakazu Kobayashi, Shin Yamamoto, Tomomi Ohgaki, Toshiro Kobayashi, Hiroyuki Toda

Publikováno v: Materials Science Forum. :1005-1010

High resolution phase contrast imaging technique has been applied to obtain clear crack images together with the detailed of microstructural features in a cast aluminum alloy. Crack opening/closure, crack extension and damage evolution in the vicinit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f59a20cd3922e7a16e9718f9a11c106b
https://doi.org/10.4028/www.scientific.net/msf.519-521.1005

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Quantitative assessment of microstructure and its effects on compression behavior of aluminum foams via high-resolution synchrotron X-ray tomography

Autor: Yasuhiro Aruga, Tomomi Ohgaki, Toshikazu Akahori, Masakazu Kobayashi, N. Kuroda, Koichi Makii, Kentaro Uesugi, Toshiro Kobayashi, Hiroyuki Toda, Mitsuo Niinomi

Publikováno v: Metallurgical and Materials Transactions A. 37:1211-1219

Synchrotron X-ray microtomography has been used for the three-dimensional characterization of microstructure in the cell walls of aluminum foams. A combination of high-resolution phase contrast imaging technique and several application techniques has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e96c05c33fb03270d180d5c258844f90
https://doi.org/10.1007/s11661-006-1072-0

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In Situ Observation of Fracture of Aluminium Foam Using Synchrotron X-Ray Microtomography

Autor: Toshikazu Akahori, Kentaro Uesugi, Toshiro Kobayashi, Yasuhiro Aruga, Hiroyuki Toda, Mitsuo Niinomi, Koichi Makii, Tomomi Ohgaki

Publikováno v: Key Engineering Materials. :1189-1195

Synchrotron X-ray microtomography has been utilized for the 3D characterisation of microstructure in the cell materials of aluminium foams. Tomographs, consisting of about 109 isotropic voxels with a maximum of 1.0µm edge, were collected at the SPri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf7919cb0dee048f8754a736419f01c9
https://doi.org/10.4028/www.scientific.net/kem.297-300.1189

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