Standardization of Cosα Method for X-Ray Stress Measurement

Toshihiko Sasaki; Ryoji Mizuno; Shigeki Takago; Yoshihisa Mishima

doi:10.4028/www.scientific.net/MSF.1016.1240

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HomeMaterials Science ForumMaterials Science Forum Vol. 1016Standardization of Cosα Method for X-Ray Stress...

Standardization of Cosα Method for X-Ray Stress Measurement

Abstract:

Performing X-ray stress measurement by a new method called the cosα method is spreading in Japan. The cosα method is characterized in that the entire diffraction ring is used and analysed. As a result, the measurement speed is fast, and the device can be downsized. On the other hand, the conventional sin²ψ method requires precise measurement of diffracted X-rays at several X-ray incident angles, which increases the measurement time and the size of the device. In addition, since only a small part of the diffraction ring generated during the X-ray irradiation is used, some of the information on the diffraction ring cannot be used so it is a wasteful method. In 2012, cosα method equipment was released in Japan. Since then, cosα method X-ray stress measurements have been performed at more than 300 facilities. In response to this situation, the Japan Society for Nondestructive Inspection (JSNDI) together with public and private institutions established a study group on the cosα method in 2014, and examined the cosα method and its appropriate use. In this paper, we report the results of this study group.

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Periodical:

Materials Science Forum (Volume 1016)

Pages:

1240-1245

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1016.1240

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Online since:

January 2021

Authors:

Toshihiko Sasaki*, Ryoji Mizuno, Shigeki Takago, Yoshihisa Mishima

Keywords:

Cosα Method, Debye Ring, Residual Stress, Standardization, X-Ray

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