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Effect of Welding Current on Microstructure Properties ofdissimilar metal joints

Auteurs : Mohamed Farid Benlamnouar, Nabil Bensaid, Amar BOUTAGHANE
Année : 2014
Domaine : Génie Chimique
Type : Communication
Conférence: 8th International Conference on Advanced Computational Engineering and Experimenting (ACE-X 2014), from June 29 to July 2, 2014, Paris, France..
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : GTA welding, Dissimilar welding, welding current, HSLA, DSS, HAZ, microstructure

Résumé :

Dissimilar metal joints between X70 and duplex pipes will be required to prove their weldability in the oil and gas industry, the welds have been performed by GTA weldingprocess using alternating current, and different values of current (between 75 and 140A),without filler metal. The results show that, the heat input has a great influence on microstructure. The details of optical microscopic observations and Scanning electron microscopy (SEM) are discussed.