Journal of Materials Engineering and Performance

, Volume 25, Issue 11, pp 4706–4717 | Cite as

Effect of Austenitic and Austeno-Ferritic Electrodes on 2205 Duplex and 316L Austenitic Stainless Steel Dissimilar Welds

Article
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Abstract

This study addresses the effect of different types of austenitic and austeno-ferritic electrodes (E309L, E309LMo and E2209) on the relationship between weldability, microstructure, mechanical properties and corrosion resistance of shielded metal arc welded duplex/austenitic (2205/316L) stainless steel dissimilar joints using the combined techniques of optical, scanning electron microscope, energy-dispersive spectrometer and electrochemical. The results indicated that the change in electrode composition led to microstructural variations in the welds with the development of different complex phases such as vermicular ferrite, lathy ferrite, widmanstatten and intragranular austenite. Mechanical properties of welded joints were diverged based on compositions and solidification modes; it was observed that ferritic mode solidified weld dominated property wise. However, the pitting corrosion resistance of all welds showed different behavior in chloride solution; moreover, weld with E2209 was superior, whereas E309L exhibited lower resistance. Higher degree of sensitization was observed in E2209 weld, while lesser in E309L weld. Optimum ferrite content was achieved in all welds.

Keywords

austenitic stainless steel dissimilar weld joint duplex stainless steel electrochemical technique 
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Notes

Acknowledgment

The authors would like to thank Director, VNIT, Nagpur, for providing necessary facilities and constant encouragement to publish this paper. The authors are also thankful to Mr. Ashvin Gaikwad, Weldfast Electrodes, Nagpur, for providing the welding facilities and electrodes. The authors would also like to thank Mrs. Varsha Patankar (Technical staff, Testing of Materials Laboratory, Department of Metallurgical and Materials Engineering) for her help in conducting mechanical testing.

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Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials EngineeringVisvesvaraya National Institute of Technology (VNIT)NagpurIndia

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