Effect of Neutron Attenuation on Strain Measurement with Large Gauge Volume

Hiroshi Suzuki; Jinya Katsuyama; Koichi Akita

doi:10.4028/www.scientific.net/MSF.772.33

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Analysis of Residual Stresses in Pistons of Motor Vehicle Engines Using Neutron Diffraction at J-PARC
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High-Pressure Deformation Techniques in Experimental Geophysics
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HomeMaterials Science ForumMaterials Science Forum Vol. 772Effect of Neutron Attenuation on Strain...

Effect of Neutron Attenuation on Strain Measurement with Large Gauge Volume

Abstract:

When measuring residual strain distributions of thick structural components such as thick butt-welds using neutron diffraction, it is required to make a gauge volume larger as well as to shorten neutron path length in a material to obtain sufficient diffraction intensity. In this study, neutron attenuation effect on the strain measurement with a large gauge volume was discussed on the normal strain measurement of a thick butt-weld. Influences of neutron attenuation like an apparent strain change were observed, and it was more noticeable when the gauge volume becomes larger. Therefore, the neutron attenuation effect should be considered in the strain measurement with a large gauge volume, and the neutron absorption corrections certainly play an important role for improvement of reliabilities of strain measurement using neutron diffraction with a large gauge volume.

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Periodical:

Materials Science Forum (Volume 772)

Pages:

33-38

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.772.33

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Online since:

November 2013

Authors:

Hiroshi Suzuki, Jinya Katsuyama, Koichi Akita

Keywords:

Attenuation, Neutron Diffraction, Residual Strain, Thick Butt-Weld

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