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Effect of shielding gases on mechanical and metallurgical properties of duplex stainless-steel welds

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Abstract

Duplex stainless steels (DSS) are well known for their higher mechanical strength and better corrosion resistance. DSS is commonly used in the marine construction, petrochemical, and chemical industries. DSS (2205) has equal amounts of α and γ phases. However, unlike the parent metal, the solidification microstructure of the fusion zone in the weld does not have nearly equal amounts of the α and γ phases. Thus the mechanical properties and corrosion resistance of DSS welds are degraded. The interpass temperature plays a vital role in achieving balanced α and γ phases, which in turn results in improved mechanical and corrosion resistance. Gas tungsten arc welding (GTAW) is employed for welding of thin sheets/plates. The GTAW process ensures small amounts of slag formation during welding, which eliminates slag crevices and sites for corrosion attack. Standard 2205 (UNS S31803) DSS sheets of 5 mm thickness, with 22.37% Cr and 5.74% Ni, were used in this study. Weld beads were produced with Zeron-100 super DSS filler wire with higher alloy content (26% Cr and 8% Ni). Argon (Ar) and helium (He) were employed as shielding gases. Heat input was maintained <1 kJ/mm. Interpass temperatures were maintained at 120°C. The ferrite number of the weld metal for the two different shielding gases was investigated. Mechanical properties of joints such as impact strength and hardness were evaluated. Microstructure evaluation was also carried out.

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References

  1. Folkhard E (1988) Welding metallurgy of stainless steel. Springer-Verlag, Vienna, p 186

    Google Scholar 

  2. Karlsson L, Ryen L, Pak S (1995) Weld J 74(11):28s

    Google Scholar 

  3. Kotecki DJ (2000) Weld J 79(12):346s

    Google Scholar 

  4. Hilkes J, Bekkers K (1995) Weld J 74(11):51

    CAS  Google Scholar 

  5. Badij R, Belkessa B, Maza H, Bouabdallah M, Bacroix B, Kahloun C (2004) Mater Sci Forum 217:467

    Google Scholar 

  6. Wang S-H, Chiu P-K, Yang J-R, Fang J (2006) Mater Sci Eng A 420:26

    Article  Google Scholar 

  7. Muthupandi V, Bala Srinivasan P, Seshadri SK, Sundaresan S (2003) Mater Sci Eng A 358:9

    Article  Google Scholar 

  8. Bonnefois B, Charles J, Dupoiron F, Soulignac A (1991) Proceedings of the conference on duplex stainless steels ‘91, vol 1, Beaune, France, p 347

  9. Bonollo F, Tiziani A, Zambon A, Penasa M (1994) Proceedings of fourth international conference on duplex stainless steels, paper 108, vol 2, Glasgow, Scotland, p 13

  10. Brown EL, Burnett ME, Purtscher PT, Krauss G (1983) Metall Mater Trans A 14:791

    Article  CAS  Google Scholar 

  11. Zambon A, Bonollo F (1994) Mater Sci Eng A 178:203

    Article  CAS  Google Scholar 

  12. Kou S (2003) Welding metallurgy, 2nd edn. Wiley, Hoboken, NJ, p 225

    Google Scholar 

  13. Ramirez AJ, Lippold JC, Brandi SD (2003) Metall Mater Trans A 34:1575

    Article  Google Scholar 

  14. Gooch TG (1982) ASM conference on duplex ferritic-austenitic stainless steels, St. Louis, p 573

  15. Ku JS, Ho NJ, Tjong SC (1997) J Mater Process Technol 63:770

    Article  Google Scholar 

  16. Honeycombe J, Gooch TG (1978) Proceedings of trends in steels and consumables, The Welding Institute, London, p 28

  17. Wahlberg G, Dunlop GL (1987) Proceedings of the conference on stainless steels, The Institute of Metals, University of New York, p 291

  18. Hertzman S, Jargelius Pettersson R, Blom R, Kivineve E, Eriksson J (1996) ISIJ Int 7(36):968

    Article  Google Scholar 

  19. Siegmund T, Werner E, Fisher FD (1993) Comput Mater Sci 1:234

    Article  Google Scholar 

  20. Kokawa H, Tomita M, Kuwana T (1995) Weld Int 9(3):8

    Article  Google Scholar 

  21. Ogawa T, Koseki T (1989) Weld J 68:181s

    Google Scholar 

  22. Charles J (1991) Proceedings of the conference on duplex stainless steels ‘91, Les editions de physique, Beaune, p 3

  23. Ogawa K, Komizo Y, Azuma S, Kudo T (1992) Trans Jpn Weld Soc 23(1):40

    CAS  Google Scholar 

Download references

Acknowledgement

The authors would like to express their heartfelt thanks to Mr. P. Veerappan, Proprietor, Keerthana Engineering Works, Tiruchirappalli-15, Tamil Nadu, India, for conducting the welding trials in his factory.

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Correspondence to P. Sathiya.

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Sathiya, P., Aravindan, S., Soundararajan, R. et al. Effect of shielding gases on mechanical and metallurgical properties of duplex stainless-steel welds. J Mater Sci 44, 114–121 (2009). https://doi.org/10.1007/s10853-008-3098-8

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  • DOI: https://doi.org/10.1007/s10853-008-3098-8

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