METHOD FOR LOW-TEMPERATURE LOCAL OBJECT LOADING IN ACOUSTIC-EMISSION NONDESTRUCTIVE TESTING METHOD

摘要

FIELD: physics.;SUBSTANCE: local stress-strain state is created in the construction by cooling the surface of the controlled area. Low-temperature energy is locally fed to the surface of the controlled area, received under the influence of the solid carbon dioxideCO₂ "Dry ice" on the local control area. The appearance of the temperature gradient in the test material area is the cause of its stress-strain state, as a result of the dislocation motion, which will be accompanied by the acoustic-emission signals. The coordinates of the detected defects are determined and the hazard criteria of the detected defects is estimated by measuring the energy of the acoustic-emission signals initiated by the dislocation motion.;EFFECT: encreasing the reliability of defect detecting and performance of non-destructive testing in the acoustic-emission method of diagnosis.;3 dwg