X線残留応力測定に及ぼす試料表面の影響
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概要
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It is a recent remarkable tendency that the method of X-ray stress measurement by means of X-rays has come to be widely utilized in many laboratories. It is also a fact, however, that some experimenters concerned with this measurement have still some doubts about its accuracy. The results of the experiments carried out in our laboratory, as was reported last year in the special issue of this society pertaining to the measurement of stress by X-rays, showed a high accuracy in the measurement. This high accuracy is considered to have been established as a result of the confirmation that the condition of the specimen surface has an important effect on the accuracy in the measurement of stress by X-rays, which was obtained through a number of investigations in our laboratory. Some literature concerning the measurement of stress by X-rays, however, treat the influence of the surface condition lightly. Accordingly, in order to make this point clear, experiments were carried out using the specimens with various surface conditions. As a result, it was found that the stress measured in the specimens with fine surfaces is in good agreement with the load stress, while that of the specimens with rough surfaces show discrepancies. Besides, as regards the residual stress, the measured values of the specimens with fine surfaces were found to be larger than those of the specimens with rough surfaces. The difference between both the measured values became larger as residual stress increased.
- 社団法人日本材料学会の論文
- 1963-12-15
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