Experimental Study on Stress Errors of Ħ Assembly X-Ray Stress Analyzer Using PSD
Toru GOTO
Abstract:Recently, the position sensitive detector (PSD) has been becoming popular as a detector for X-ray stress measurement. However, little information is available in the literature regarding the effects of systematic errors on the stress measurement using the PSD. Therefore, the authors have developed a modeling of the Ħ assembly X-ray stress analyzer enabling us to simulate the stress measurement under the various conditions including specimen mis-setting and mis alignment of collimator and detector. In this paper, stress measurement of Fe powder specimen under mis-setting and/or collimator misalignment was conducted by an Ħ assembly X-ray stress analyzer using PSPC. It was found that the X-ray stresses experimentally obtained were well coincident with those calculated by the simulation, though the stress distribution on specimen surface was taken into account. As the conclusion, it is confirmed that the modeling and simulation can estimate X-ray stress under various systematic errors and that the simple methods proposed based on the studies using the simulation are effective for approximation of the stress error under various systematic errors. Key Words:X-ray stress measurement, Position sensitive detector, Ħ assembly method, Systematic error, Stress error