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Methodology for Measurement of Residual Stress in Welded Joints by the Technique of Pulse-Echo Ultrasound

Published online by Cambridge University Press:  24 February 2014

A. Ballesteros-Hinojosa ,
J.J. Ruíz- Mondragón ,
J. Acevedo-Dávila  and
F. Macias-Lopez
A. Ballesteros-Hinojosa*
Affiliation:
Corporación Mexicana de Investigación en Materiales (COMIMSA). Calle Ciencia y Tecnología No 790 Fraccionamiento Saltillo 400, Saltillo, Coahuila, México, C.P. 25290.
J.J. Ruíz- Mondragón
Affiliation:
Corporación Mexicana de Investigación en Materiales (COMIMSA). Calle Ciencia y Tecnología No 790 Fraccionamiento Saltillo 400, Saltillo, Coahuila, México, C.P. 25290.
J. Acevedo-Dávila
Affiliation:
Corporación Mexicana de Investigación en Materiales (COMIMSA). Calle Ciencia y Tecnología No 790 Fraccionamiento Saltillo 400, Saltillo, Coahuila, México, C.P. 25290.
F. Macias-Lopez
Affiliation:
Corporación Mexicana de Investigación en Materiales (COMIMSA). Calle Ciencia y Tecnología No 790 Fraccionamiento Saltillo 400, Saltillo, Coahuila, México, C.P. 25290.
*
*Email: [email protected]
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Abstract

Recently they have discovered a large number of oil wells, however these are found in deeper waters. So it is necessary to develop a repair's methodology and inspection for this type of system to prove its operation. This research was focused to establish a methodology for evaluating residual stress generated from the application of solder in a subsea environment, in order to establish whether there is a relationship between residual stress and the depth of the sea. For this purpose was used underwater electrodes (UW -CS- 1) and an API 5L X65 steel to the development of underwater welds, which was welded at 10 and 15 meters depth by a diver welder on site. The measurement of residual stress is developed using non-destructive techniques, the first one was ultrasound technique (UT) which was the technique proposed by viability to being applied in site and as a second option, was applied X-ray diffraction (XRD), with the objective to validate the results obtained by ultrasound technician. The results showed a similar behavior between both non-destructive techniques. In this study was observed the tendency to increase the level of residual stress with increasing the work depth.

Keywords

weldingx-ray diffractionthermal stresses
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1616: Symposium S5C – Structural and Chemical Characterization of Metals, Alloys, and Compounds - 2013 , 2014 , imrc2013-s5c-o034
Copyright
Copyright © Materials Research Society 2014 

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