Simulation of phased array S-scan acoustic field in FSW joint of aluminum alloy extrudate with complex shape  

作　　者：王常玺 刚铁 

机构地区：[1]State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin,150001

出　　处：《China Welding》2015年第1期31-36,共6页中国焊接（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 51175113 ）.

摘　　要：The shape of aluminum alloy extrudate used in high-speed train is complex, structural noises from the surfaces of the extrudate will be received when using ultrasonic phased array to detect the flaws in FSW. To solve this problem, ultrasonic phased array acoustic field model and propagation simulation of acoustic waves were introduced to simulate the acoustic pressure distribution and the propagation of the acoustic waves. With the methods above, the detection parameters can be optimized and as a result, the experimental process can be simplified and the detection efficiency can be improved. Meanwhile, the echoes in the S-scan images can be predicted, which can help analyze the detection results and judge the defects.The shape of aluminum alloy extrudate used in high-speed train is complex, structural noises from the surfaces of the extrudate will be received when using ultrasonic phased array to detect the flaws in FSW. To solve this problem, ultrasonic phased array acoustic field model and propagation simulation of acoustic waves were introduced to simulate the acoustic pressure distribution and the propagation of the acoustic waves. With the methods above, the detection parameters can be optimized and as a result, the experimental process can be simplified and the detection efficiency can be improved. Meanwhile, the echoes in the S-scan images can be predicted, which can help analyze the detection results and judge the defects.

关 键 词：aluminum extrudate phased array acoustic field simulation FSW 

分 类 号：TQ151.4[化学工程—电化学工业] TG115.285[金属学及工艺—物理冶金]