Mechanical and Electrochemical Properties of AISI4130/Austenitic Steels Dissimilar Welded Joints

• Published in: Diffusion Foundations Vol. 18; pp. 65 - 72
• Main Authors: Allou, Djilali, Belkessa, Brahim, Miroud, Djamel, Cheniti, Billel, Ouadah, Mhamed
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 05.09.2018
• Subjects: Austenitic stainless steels; Base metal; Carbon steels; Chromium molybdenum steels; Corrosion resistance; Corrosion resistant alloys; Dissimilar material joining; Dissimilar metals; Electrochemical analysis; Mechanical properties; Shielded metal arc welding; Steel industry; Sulfuric acid; Weld metal; Welded joints; Electrochemical Behavior; AISI 4130; Austenitic; Overlay; SMAW
• ISSN: 2296-3650; 2296-3642; 2674-0303; 2296-3642; 2674-029X
• DOI: 10.4028/www.scientific.net/DF.18.65

The microstructure and mechanical properties of AISI 4130 and austenitic stainless-steel overlay dissimilar weld joint using Shield Metal Arc Welding (SMAW) process were investigated. Two different filler alloys have been employed (ENiCrFe-3 and E309 MoL-17). A type II boundary was formed close to the fusion boundary at the AISI 4130 side, due to the diffusion of carbon from the carbon steel (CS) base metal towards the weld metal. On the other side, the joints strength and hardness profiles were almost independent of filler alloy, where the highest hardness value was recorded in the area between the line fusion and the type II boundary. The polarization tests performed in different regions of the welded joints in H2SO4 solution (PH 4.7) revealed a high corrosion resistance of both filler alloys.