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Multicomponent Phase Diagram of Lean Duplex Stainless Steel UNS S82441 and Its Application to Evaluate the Microstructure in the Heat Affected Zone

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Abstract

Duplex stainless steels are Fe-Cr-Ni-Mo-N alloys with nitrogen replacing some nickel to improve its properties. These steels have a balanced microstructure, which means that ferrite (α) and austenite (γ) are in equal proportions of approximately 50% by volume. These alloys have a tendency to form intermetallic precipitates such as chromium nitrides and sigma phase (σ), depending on their chemical composition and welding thermal history. Precipitation of these intermetallic phases can impair mechanical and corrosion properties. In addition, material processes such as welding and heat treatment can change the balanced microstructure. The objective of this work was to compare phases formed during heat treatment and welding of duplex stainless steel UNS S82441 with the equilibrium phases predicted by Thermo-calc® software. In general, the results showed good agreement between predicted and measured phases, as well as, agreement between the measured volume fraction of austenite in the heat-affected zone and austenite predicted by Thermo-calc® software.

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References

  1. W. Wessling and H.E. Bock, Properties and Applications of a Recently Developed Ferrite-Austenitic Steel Containing 0,02% C, 22% Cr, 3% Mo and 0,12% N in Comparison with Molybdenum-Alloyed Austenitic Steels, Stainless Steel 77, Climax Mol. Co., England, n. Barr, R.Q., Sept. 26-27 1977, p 217-226

  2. N. Sridhar, J. Kolts, and L.H. Flasche, A Duplex Stainless Steel for Chloride Environments, J. Met., 1985, 37(3), p 31-35

    Google Scholar 

  3. T. Ogawa and T. Kosheki, Weldability of duplex stainless steel, Doc.IIW, 1986, v. IX, p 1416-1486

  4. T.G. Gooch, Welding and Weldability of Stainless Steel, Stainless Steel 84, Chalmers University of Technology, Gotenborg, Sweden, Sept. 3-4, 1984, p 343-352

  5. S.D. Brandi, Estudo da soldabilidade do Aço Inoxidável Duplex DIN W.Nr.1.4462 (UNS S31803) (Study of the weldability of Duplex Stainless Steel DIN W.Nr.1.4462 (UNS S31803)), PhD thesis, Departamento de Engenharia Metalúrgica, Escola Politécnica, Universidade de São Paulo, São Paulo, 1992, p. 265 (in Portuguese)

  6. J. Street, Welding Duplex Stainless Steel for Arduous Service, Met. Constr., 1986, 18(9), p 565-569

    Google Scholar 

  7. S.D. Brandi, Some Aspects of Weldability and Jointability of Duplex Stainless Steels, Mater. Sci. Forum, 2003, 426(432), p 4063-4068

    Article  Google Scholar 

  8. S.D. Brandi, Weldability of Duplex Stainless Steels. In: AWS. (Org.), AWS Welding Handbook, 9a. ed. Miami, USA: American Welding Society, 2011, v. 4, p 351-368

  9. A.J. Griffiths and A.T., Performance of Duplex Stainless Steels in Oilfield Environments. In: L.A.J.L. Sarton, H.B. Zeedijk (Eds.), Proceedings, 1, Netherlands Society for Materials Science, Zwijndrecht, 1997, p. 1/79-1/82

  10. ASM, Proprieties and selection: Irons, Steels and High performance alloys, ASM International Metals Handbook, US, 1990, v. 1

  11. H.D.T. Solomon, A tale of two phases, Conference Duplex Stainless Steel’s 82-Proceedings, Estados Unidos, St. Louis, 1982, p 693-756

    Google Scholar 

  12. R.S.C. Paredes et al, Avaliação da soldabilidade de aços inoxidáveis especiais a ser utilizados na industria do petróleo (Evaluation of the weldability of special stainless steels to be used in the oil industry), 2º Congresso Brasileiro de P&D em Petróleo & Gás, 2003 (in Portuguese)

  13. S.D. Brandi, L.M.Y. Silveira, and D.L.B. Vasconcelos, Aplicação da norma ASTM A923-Prática A para identificação de fases intermetálicas em junta soldada de aço inoxidável superduplex UNS 32750 (Application of ASTM A923-Practice A for identification of intermetallic phases in welded joints of super duplex stainless steel UNS 32750), Rem. Revista Escola de Minas, 2010, 63(1), p 153-158 (in Portuguese)

    Article  Google Scholar 

  14. A.F. Padilha, R.L. Plaut, and S. Degallaix-Moreuli, Phase Transformation and Microstructure, Duplex Stainless Steels, Vol 1, ISTE Ltd, London, 2009, p 115-139

    Google Scholar 

  15. N. Suutala, T. Takalo, and T. Moisio, The Relationship Between Solidification and Microstructure in Austenitic and Austenitic-Ferritic Stainless Steel Welds, Met. Trans., 1979, 10A(4), p 512-514

    Article  Google Scholar 

  16. T. Takalo, N. Suutala, and T. Moisio, Austenitic Solidification Mode in Austenitic Stainless Mode in Austenitic Stainless Steel Welds, Met. Trans., 1979, 10A(8), p 1173-1181

    Article  Google Scholar 

  17. N. Suutala, T. Takalo, and T. Moisio, Ferritic-Austenitic Solidification Mode in Austenitic Stainless Steel Welds, Met. Trans., 1983, 14A(2), p 191-197

    Article  Google Scholar 

  18. A.J. Ramirez, S.D. Brandi, and J.C. Lippold, Relationship Between Chromium Nitride and Secondary Austenite Precipitation in Duplex Stainless Steels, Metall. Mater. Trans. A, 2003, 34A(8), p 1575-1597

    Article  ADS  Google Scholar 

  19. A.J. Ramirez, J.C. Lippold, and S.D. Brandi, Secondary Austenite and Chromium Nitride Precipitation in Simulated Heat Affected Zones of Duplex Stainless Steels, Sci. Technol. Weld. Join., 2004, 9(4), p 1-13

    Article  Google Scholar 

  20. E.A. Pauli and S.D. Brandi, Influência da Energia de Soldagem na Microestrutura e na Microdureza de uma Junta Soldada (Influence of welding heat input on the microstructure and microhardness of a welded joint), XLI Consolda - Congresso Nacional de Soldagem, Salvador, October 2015 (in Portuguese)

  21. D.N. Noble, T.G. Gooch, Factors controlling the ferrite/austenite balance in arc welded 22Cr/5Ni/2,5Mo/N duplex stainless steel, Weld. Inst. Res. Report 321/1986, Nov, 1986

  22. R. Fedele, S.D. Brandi and S.G. Lebrão, Soldagem multipasse do aço inoxidável duplex UNS S31803 por eletrodo revestido (Welding multipass duplex stainless steel UNS S31803 by coated electrode), Soldagem & Inspeção – Ano 6. Nº 1 – Supplement Technical BR, Belo Horizonte, 1999 (in Portuguese)

  23. M. Senatore, L. Finzetto, E. Perea, Estudo comparativo entre os aços inoxidáveis duplex e os inoxidáveis AISI 304l/316L (A comparative study between duplex stainless steels and AISI 304L / 316L stainless steels), VIII Seminário Brasileiro do Aço Inoxidável, 2006 (in Portuguese)

  24. S.D. Brandi and C.J. L., Considerações sobre Metalurgia soldagem de aços inoxidáveis duplex e superduplex (Considerations on Welding Metallurgy of Stainless Duplex and Super Duplex Stainless Steels), Metalurgia & Materiais, 1997, vol 53 (453), p 141–146 (in Portuguese)

  25. J.O. Nilsson, The physical metallurgy of duplex stainless steel, Conference duplex stainless steel 97, Netherlands, 1997, p 73-82

  26. C. Shek, K.W. Wong, and J.K.L. Lai, Review of Temperature Indicators and the Use of Duplex Stainless Steels for Life Assessment, Mater. Sci. Eng., 1996, R19, p 153-200

    Google Scholar 

  27. J.O. Nilsson, Superduplex Stainless Steels, Mater. Sci. Technol., 1992, 8, p 685-700

    Article  Google Scholar 

  28. M. Pohl, O. Storz, and T. Glogowski, Effect of Intermetallic Precipitations on the Properties of Duplex Stainless Steel, Mater. Charact., 2007, 58, p 65-71

    Article  Google Scholar 

  29. H.D. Solomon, T.M. Devine, and R.A. Lula, Duplex Stainless Steel, American Society for Metals, Metals Park, 1983, p 553-572

    Google Scholar 

  30. Y.S. Ahn and J.P. Kang, Effect of Aging Treatments on Microstructure and Impact Properties of Tungsten Substituted 2205 Duplex Stainless Steel, Mater. Sci. Technol., 2000, 16(4), p 382-387

    Article  Google Scholar 

  31. A.J. Sedriks, Corrosion of Stainless Steel, Cap1, Wiley, New York, 1996, p 13-25

    Google Scholar 

  32. R. Gunn, Duple Stainless Steels—Microstructure, Properties and Applications, Abington Publishing, Cambridge, 2003

    Google Scholar 

  33. J.W.A. Menezes et al, Efeito da energia de soldagem sobre a fração volumétrica da fase ferrítica no aço inoxidável duplex UNS S 31803 (Effect of the welding heat input on the volume fraction of the ferrite phase in stainless steel duplex UNS S 31803), 3° Congresso Brasileiro de P&D em Petróleo e Gás, Salvador, October 2005 (in Portuguese)

  34. B.D. Cullity, X-ray Diffraction, Addison-Wesley Publ. Co., Boston, 1967, p 324-344

    Google Scholar 

  35. M.F. Ashby and K.E. Easterling, A First Report on Diagrams for Grain Growth in Welds, Acta Metall., 1982, 30, p 1969-1978

    Article  Google Scholar 

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Acknowledgments

The authors appreciate the donation of Outokumpu duplex UNS S82441 steel, and Voith in providing consumables and to Prof. Dr. Flávio Beneducci for help with phase diagrams discussion.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Escola Politecnica da USP, São Paulo, São Paulo, Brazil

    Evandro Armini de Pauli, Claudio Geraldo Schön & Sérgio Duarte Brandi

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  1. Evandro Armini de Pauli
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  2. Claudio Geraldo Schön
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  3. Sérgio Duarte Brandi
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Correspondence to Sérgio Duarte Brandi.

Additional information

This article is an invited paper selected from presentations at TOFA 2016, the Discussion Meeting on Thermodynamics of Alloys, held September 4–9, 2016, in Santos, Brazil, and has been expanded from the original presentation.

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de Pauli, E.A., Schön, C.G. & Brandi, S.D. Multicomponent Phase Diagram of Lean Duplex Stainless Steel UNS S82441 and Its Application to Evaluate the Microstructure in the Heat Affected Zone. J. Phase Equilib. Diffus. 38, 332–342 (2017). https://doi.org/10.1007/s11669-017-0551-x

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  • DOI: https://doi.org/10.1007/s11669-017-0551-x

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