“…Among several non-destructive techniques used for material evaluation [2][3][4][5] , such as X-ray, blind hole drilling, eddy current, BN [6,7] offers exceptional material and stress characterization capabilities, good reliability, and high inspection speed, but the capacity for the detection of geometrical discontinuities is relatively poor, while MMM [8,9] offer good defect detection, stress detection and stress history record capacity. In this paper, BN and MMM testing technique were adopted for applied tensile stress measurement.…”