放射光白色X線を用いたCTによる丸棒鋼内部き裂の観察とその先端近傍のひずみマッピング

Observation of internal crack of steel bar by computed tomography and strain mapping near its tip using synchrotron white X-ray

柴野 純一*; 桐山 幸治; 梶原 堅太郎*; 菖蒲 敬久  ; 鈴木 賢治*; 新居 恭征*; 三浦 節男*; 小林 道明*

Shibano, Junichi*; Kiriyama, Koji; Kajiwara, Kentaro*; Shobu, Takahisa; Suzuki, Kenji*; Arai, Takayuki*; Miura, Setsuo*; Kobayashi, Michiaki*

A computerized tomography and a strain mapping near a crack tip in material were investigated using a white X-ray obtained from BL28B2 beam line at SPring-8 in Japan. The computerized tomography of the crack in the specimen was carried out by using the CCD camera that can detect indirectly the X-ray transmitted through the specimen. To measure the strain using the energy dispersive X-ray diffraction technique. As the results, the computerized tomography of the crack in the specimen under the tensile loading was practicable by using the white X-ray. The map of the internal strain near the crack tip of the specimen could be obtained using the high energy white X-ray. It was confirmed that the maximum tensile strain was distributed circularly along the crack tip estimated by CT.