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

Abstract:

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.

• Periodical: Diffusion Foundations (Volume 18)
• Pages: 65-72
• DOI: https://doi.org/10.4028/www.scientific.net/DF.18.65
• Online since: September 2018
• Authors: Djilali Allou*, Djamel Miroud, Billel Cheniti, Brahim Belkessa, Mhamed Ouadah
• Keywords: AISI 4130, Austenitic, Electrochemical Behavior, Overlay, SMAW

References

[1] B. T. Alexandrov, J. C. Lippold, J. W. Sowards, A. T. Hope, and D. R. Saltzmann, Fusion boundary microstructure evolution associated with embrittlement of Ni-base alloy overlays applied to carbon steel,, Weld. World, vol. 57, no. 1, p.39–53, (2013).

DOI: 10.1007/s40194-012-0007-1

[2] I. B. Joints, the Effect of Pwht on the Material Properties and Micro Structure in,, p.8–13, (2003).

[3] Mfg. VCM Beaugrand,LS Smith, Hydrogen embrittlement of 8630M/625 subsea dissimilar joints: factors that influence the performance., OMAE ASME Proceedings | Materials Technology, Honolulu, p.227–236, (2009).

DOI: 10.1115/omae2009-80030

[4] V.C.M. Beaugrand • L.S. Smith • M. F. Gittos, Subsea dissimilar joints: failure mechanisms and opportunities for Mittigation., NACE, Atlanta GA, p.14, (2009).

[5] ESAB, Wear resistant coatings for longer life, Weld Repair and Maintenance Guide, ESAB. ESAB, (2003).

[6] P. B. Srinivasan, V. Muthupandi, W. Dietzel, and V. Sivan, An assessment of impact strength and corrosion behaviour of shielded metal arc welded dissimilar weldments between UNS 31803 and IS 2062 steels,, Mater. Des., vol. 27, no. 3, p.182–191, (2006).

DOI: 10.1016/j.matdes.2004.10.019

[7] B. Belkessa, D. Miroud, N. Ouali, and B. Cheniti, Microstructure and mechanical behavior in dissimilar SAF 2205/API X52 welded pipes,, Acta Metall. Sin. (English Lett., vol. 29, no. 7, p.674–682, (2016).

DOI: 10.1007/s40195-016-0428-8

[8] A. ZALT, Endommagement par fatigue et prédiction de durée de vie des joints soudé de type caisson,, Université de lorraine, (1993).

[9] J. C. LIPPOLD, WELDING METALLURGY AND WELDABILITY. New Jersey: John Wiley & Sons, (2015).