Original paper(Vol.48 No.7 pp.717)

Abstract:Recently, the position sensitive proportional counter (PSPC) is becoming popular as the detector for the X-ray stress measurement. However, the author considers that the characteristics of the X-ray stress measurement using PSPC are not yet studied enough. In this paper, the influence of specimen missetting to the X-ray stress measurement is discussed based on the results investigated as one of the factors affecting the influence of computer simulation and experimental studies for the case of side inclination method. The size of collimator is also. As the results, it was found that the error in stress measurement is proportional to the ratio L/R₀(L;offset of missetting, R₀;goniometer radius). About 25 MPa of the error occurs at L/R₀=0.0025 in the case of the measurement of ferrite sample using Cr target. The size of collimator has little effect to the relation between the error and L/R₀.

Key Words:X-ray stress measurement, Position Sensitive Proportional Counter (PSPC), Specimen Missetting, Side inclination method, Collimator