双極GM計数管を用いたX線応力測定法について : X線応力測定特集号

概要

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The industrial X-ray stress meter with a twin pole Geiger-Muller counter which is used in factories is explained here. Its applications and accuracy in various conditions of the setting of the goniometer are also discussed. The focusing technique of the X-ray beams diverging from a virtual line focus which can be obtained by the divergent Soller slit is applied in this equipment. The differential counting rate meter is to indicate zero, when the receiving slit of the twin pole Geiger-Muller counter bisects radially the energy of reflected X-ray to be measured at its maximum point. So, the influence of the variation of the intensity of the X-ray source which is one of the most serious problems in the counter method can be eliminated. The geometry adopted here has two advantages : One is that the X-ray intensity is increased effectively by allowing the X-ray tube to come near to the specimen, and the other is that the twin counter can move easily from the focusing point P to Q, and vice versa. Errors by the mis-setting of the twin counter or the goniometer were checked by using Fe powder specimen. The stress induced by the bending test and the residual stress induced by welding of the carbon steel were measured by means of this method or strain gage. Several results are shown here.
社団法人日本材料学会の論文
1962-11-15