Phased Array-Based Ultrasonic Testing of Explosively Welded Aluminium and Stainless Steel Plates
Phased array-based ultrasonic testing has emerged as a powerful tool in enhancing the understanding of soundness of joints, particularly for non-conventional joining techniques such as explosive welding. This technique is quite promising and provides a good co-relation between bonded and de-bonded regions in terms of different colours and varied intensities. In this paper, explosively welded stainless steel and aluminium joint was inspected with the help of phased array-based ultrasonic inspection technique. The experimental set-up as well as the inspection process using phased array technique has been discussed in detail. A-scan, B-scan and C-scan have been generated for the entire plate. The bonded regions and de-bonded area of the plate have been differentiated as well as recorded using the varied colours and their intensities in C-scans. The results of phased array confirmed the % bonded area for SS–Al combination to be more than 70%.
KeywordsExplosive welding Phased array Ultrasonic Velocity of detonation
The support from Terminal Ballistics Research Laboratory is greatly acknowledged. Authors are very thankful to Dr. Manjit Singh, Director, TBRL, Sec 30, Chandigarh, all the scientists, M.T. & Workshop of TBRL for their valuable support.
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