Locating flaws in anisotropic and inhomogeneous weldments using ray tracing method  

作　　者：赵新玉 刚铁 肖定国 王浚人 

机构地区：[1]Key Laboratory of Fundamental Science for Advanced Machining, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081 [2]State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001

出　　处：《China Welding》2011年第1期17-21,共5页中国焊接（英文版）

基　　金：This study was supported by State Key Laboratory of Advanced Welding Production Technology and National Natural Science Foundation of China （Grant No. 50975028, 50775054）.

摘　　要：Ultrasonic inspections on nickel-based alloy weldments meets some difficulties due to the curvilinear propagating paths will appear in both anisotropic and inhomogeneons 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.Ultrasonic inspections on nickel-based alloy weldments meets some difficulties due to the curvilinear propagating paths will appear in both anisotropic and inhomogeneons 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.

关 键 词：ultrasonic nondestructive testing nickel-based alloy weldments ray tracing 

分 类 号：TG404[金属学及工艺—焊接] P228.4[天文地球—大地测量学与测量工程]