doi: 10.7763/IJIMT.2013.V4.384
Using L<sub>CR</sub> Ultrasonic Method to Evaluate Residual Stressin Dissimilar Welded Pipes
Yashar Javadi1
, ,
- 1Islamic Azad University-Semnan Branch, Semnan,Iran.
- 2Department of Civil and Structural Engineering Educators, ASPETE, Athens, Greece.
- 3Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran.
Abstract
The ultrasonic residual stresses measurement is based on the acousto elastic effect that refers to the change in velocity of the elastic waves when propagating in a stressed media. The experimental method using the longitudinal critically refracted (LCR) waves requires an acousto elastic calibration and an accuracy measurement of the time-of-flight on both stressed and unstressed media. This paper evaluates welding residual stresses in dissimilar pipe-pipe joint of AISI stainless steel 304 and Carbon Steel A106-B type. The residual stresses in inner and outer surface of pipes were evaluated by LCR ultrasonic waves by using 1Mhz, 2Mhz, 4Mhz and 5Mhztransducers. It has been shown that the difference in residual stresses between inner and outer surfaces of pipes and also between Stainless steel and Carbon Steel side can be inspected by LCR waves.
Keywords
- Ultrasonic stress Measurement
- acousto elasticeffect
- welding residual stress
- L<sub>CR</sub>
- dissimilar welded joint
How to Cite
Yashar Javadi, Vagelis Plevris, and Mehdi Ahmadi Najafabadi, "Using L<sub>CR</sub> Ultrasonic Method to Evaluate Residual Stressin Dissimilar Welded Pipes," International Journal of Innovation, Management and Technology, vol. 4, no. 1, pp. 170-174, 2013. https://doi.org/10.7763/IJIMT.2013.V4.384
Copyright & License
Copyright © 2013 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).