Ultrasonic Evaluation of Friction Stir Welding
Friction stir welding (FSW) is a new welding technology, which has been applied widely in aerospace, traffic, marine, etc., industries because of its unique mechanical properties and metallurgic structure. It is common importance to find effective nondestructive evaluation technique for FSW because design and manufacturing technology need data as input. A new ultrasonic method, which is based on multiple-incident angle reflection at welds by using spot-focused beam, for evaluation of defects in aluminum alloy FSW has been investigated. The relationship of incident angles and possible directions of defects in FSW with reflective coefficient R has been used to analyze and estimate scanning incident angle range of probe beam. Optimum ultrasonic reflection direction can be obtained during the scanning by using multiple-incident angle method. It is helpful to improve detectability of defects in FSW. The experiment results presented in this paper show that ultrasonic evaluation based on multiple-incident angles by using C-scan technique is an effective nondestructive inspection for FSW. The validity and agreement of the A-scan and C-scan results are validated by a strict destructive testing.
Friction stir welding Ultrasonic evaluation Multiple-incident reflection
Feifei LIU Songping LIU Enming GUO Legand LI
The Center of NDT&E, Beijing Aeronautical Manufacturing Technology Research Institute; Beijing 100024, China
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1478-1484
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）