Study on the Application of Ultrasonic Nondestructive Testing Method for Residual Stress of Autofrettaged Barrel

Abstract Gun barrel under high bore pressure in the process of gun launching. The tangential stress was produced by autofrettaged technology, which can greatly improve bearing capacity barrel. ultrasonic nondestructive testing method used to design residual device bore. 125 mm at certain depth from inner surface measured. finite element model considering hydraulic autofrettage and finish machining outer established, simulation data compared with test data. It showed that two methods have fine consistency. This technology be applied detection total life cycle, accumulate valuable for improving safety.