Study on evaluation of ductile damage of aluminum single crystal using synchrotron white X-ray

Shibano, Junichi*; Kiso, Minoru*; Kajiwara, Kentaro*; Shobu, Takahisa; Miura, Setsuo*; Kobayashi, Michiaki*

Zairyo, 62(7), p.443 - 450, 2013/07

https://doi.org/10.2472/jsms.62.443

The ductile damage progress of the FCC single crystal was verified by the profile analysis using the white X-ray obtained in BL28B2 beam-line of SPring-8. In this study, an aluminum single crystal of the purity 6N was used as a specimen prepared in the I-type geometry for tensile test. The notch was introduced into one side of the center of a parallel part of the specimen by wire electric discharge machining. White X-ray, which has 200 microns in height and 100 microns in width, was incident into the specimen on the Bragg angle of 3 in the horizontal plane using energy dispersive X-ray diffraction technique. As a result, in 1.1% of applied strain, increase of the lattice strain was observed in the direction of about 45 of slant from the notch bottom. In 2.2% of applied strain, the lattice strain reduced in the direction of about 45 of slant from the notch bottom. Non-uniform strain and dislocation density decreased similarly.

Transmission imaging and strain mapping in the vicinity of internal crack tip using synchrotron white X-ray

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

Materials Science Forum, 638-642, p.2476 - 2481, 2010/01

Study on imaging and strain mapping in the vicinity of internal crack tip using synchrotron white X-ray

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

Zairyo, 57(7), p.667 - 673, 2008/07

https://doi.org/10.2472/jsms.57.667

Measurement of internal strain in materials using high energy synchrotron radiation white X-rays

Shibano, Junichi*; Shobu, Takahisa; Suzuki, Kenji*; Hirata, Tomoyuki*; Kaneko, Hiroshi; Kobayashi, Michiaki*

Zairyo, 56(10), p.985 - 992, 2007/10

https://doi.org/10.2472/jsms.56.985

This paper presents a basic research on a measurement of strain in the bulk of materials by using high energy white X-rays from a synchrotron radiation source of SPring-8. WEL-TEN780E (JIS G3128 SHY685) whose grain size was 0.013 mm was used as a specimen. The specimen was loaded with four point bending. The white X-ray beam, which has a height of 0.05 mm and width of 0.03 mm, was incident in it. Bending strain at the surface of specimen was measured by a strain gauge. The internal strain of SHY685 of 5 mm thickness could be evaluated using white X-rays which range of energy from 60 keV to 150 keV. Furthermore, the measurement error of strain could be decreased by using the diffracted X-rays with high energy, high peak count and the profile which is close to Gaussian curve. The results showed that the high energy white X-ray is effective for internal strain measurements.

Study of computerized tomography and strain mapping in the vicinity of crack tip in steel material using synchrotron white X-ray

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

no journal, , 

Measurement of stress and imaging in the vicinity of fatigue crack in steel material using synchrotron radiation white X-rays

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

no journal, , 

Residual stress measurement is important to understand Stress Corrosion Cracking process. In this study, measurements of imaging and inner stress mapping around a crack-tip in steel material (alpha-Fe) have performed at beam-line BL14B1 and BL28B2 at SPring-8. The results showed that artificial cracking in the sample was clearly measured by imaging and that stress maps quite correspond to the result of imaging. Therefore, these methods are very effective tool for measurement of inner state of steel material.