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概要

X-Ray diffraction spots from coarse grains of austenitic stainless steel, SUS316L, were measured with an area detector. The error of the measurement of the diffraction angle was investigated.“ -method ”was proposed to solve the error due to the position of the coarse grain. However, the -method was not effective in solution of the error. A double-exposure method (DEM) was proposed as the measurement without error due to the position of the coarse grain. The DEM did not solve the error due to the divergent X-ray beam. From this study, it was found that the measurement error of the diffraction angle is caused by the position of each coarse grain and the divergence of the X-ray beam, when the diffraction angle is determined from the diffraction spot.

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