Effect of filler metal on mechanical properties and corrosion behavior of dissimilar metals welds

Auteurs :  B. BELKESSA, D. Miroud, B. Cheniti, N. OUALI
Année : 2019
Domaine : Sciences des matériaux
Type : Communication
Conférence: 72nd IIW Annual Assembly and International Conference
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : Dissimilar metals welding; 2205 duplex stainless steel; API X52 HSLA steel; Heat-affected zone.

Résumé : 

This work purposes to investigate the microstructure and the mechanical behavior of dissimilar metals weld between 2205 duplex stainless steel (UNS 31803) and high strength low alloy steel API X52. The joining was produced by shielded metal arc welding process using two different filler metals, the duplex E2209 and austenitic E309 grade.The microstructures of the dissimilar welded joints have been investigated by optical microscopy, scanning electron microscopy and energy-dispersive spectroscopy (EDS). The EDS analysis performed at the API X52/weld metal interface showed an evident gradient of Cr and Ni between fusion and type II boundaries, where the highest Nano hardness value was recorded.