论文部分内容阅读
Ultrasonic inspections on nickel-based alloy weldments meets some difficulties due to the curvilinear propagating paths will appear in both anisotropic and inhomogeneous welded joints.Thus,it is difficult to determine the exact location of flaws using the traditional ultrasonic testing method which is based on the assumption that the sound beam will propagate in straight lines.In order to overcome this problem,we provide a new model-based inspection approach to locate the flaws in the nickel-based alloy weldments.Furthermore,some experimental examinations are carried out to compare the locating accuracy between the traditional and the modeled-based approach.It shows that the provided model-based inspection method is more accurate than the traditional method in inspection of the nickel-based alloy weldments.