Computer aided system of X-ray stress measurement

An automatic nondestructive stress measurement system is presented which employs a computer to compile and process X-ray diffraction data. The data are sampled at regular time intervals by a continuous scanning method and are smoothed by a 9-point parabolic approximation. The stress is calculated by the 9-point parabola fitting technique and the half-value breadth method with correction for the background. Results obtained with the computerized system are in perfect agreement with the values obtained by conventional methods. However, the proposed system has the advantage of high efficiency and of being free of human error.