Research and Proposal on Welding Technique for Longitudinal Crack Defect Welding
International Journal of Mechanical Engineering and Applications
Volume 3, Issue 1-3, February 2015, Pages: 29-34
Received: Dec. 10, 2014; Accepted: Jan. 7, 2015; Published: Jan. 14, 2015
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Authors
Dang Thien Ngon, School of Mechanical Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh city, Vietnam
Phan Van Toan, Department of Mechanical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh city, Vietnam
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Abstract
Manufacturing of intentional crack defect welding as designed and similar to realistic crack defects for researches of mechanical properties of welding and training of non-destructive testing (NDT) operator is a difficult and challenging work. Nowadays, methods for manufacturing of specimens of welding with cracking defect still exists some disadvantages such as difficulty in manufacturing, reactionless of the cracks to NDT techniques, the difference between the crack shape and that in nature, and high cost, etc. In this research, we propose a new approach to create welding crack with residual stress using cast iron electrodes. The process to create the welding cracks based on this technology using the SMAW combining with GTAW allows to create the welding with cracks similar to those in nature. Cracks are created with lateral deviation not more than ± 0.5 mm, well response to the phased array ultrasonic testing technique and have similar shape to natural shape of the crack defect.
Keywords
Crack Defect, SMAW, GTAW, Nondestructive Testing (NDT), Phased Array Ultrasonic Testing (PAUT)
To cite this article
Dang Thien Ngon, Phan Van Toan, Research and Proposal on Welding Technique for Longitudinal Crack Defect Welding, International Journal of Mechanical Engineering and Applications. Special Issue: Transportation Engineering Technology. Vol. 3, No. 1-3, 2015, pp. 29-34. doi: 10.11648/j.ijmea.s.2015030103.15
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