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Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process

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Abstract

The microstructures and mechanical properties of gas tungsten arc-welded joints of superalloy K4750 that has been newly developed were examined. The microsegregation pattern during solidification of the fusion zone indicated that Fe was prone to segregate into the dendritic core, while Nb, Mo, Ti, W and Si were rejected into the dendritic boundary. The phase transformation sequence of the K4750 alloy fusion zone was L → L + γ → L + γ +(Ti,Nb)C → γ + (Ti,Nb)C. Heat-affected zone (HAZ) examination shows it consisted of partially melted zone with liquated MC carbides and liquated grain boundaries. Cracking-free HAZ microstructure suggested that K4750 alloy possess excellent HAZ cracking resistance properties. Relatively low concentration of Al and Ti results in the excellent cracking resistance properties of the alloy. Vickers microhardness of as-welded joint is lower than that of post-weld heat treatment (PWHT) joint across the whole joint due to the absence of 50 nm spherical γ′ particles formed during PWHT. Tensile properties of as-welded joints are comparable to PWHT joints in terms of the ultimate tensile strength and elongation.

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References

  1. Reed RC (2006) The superalloys fundamentals and applications. Cambridge University Press, New York

    Book  Google Scholar 

  2. Sun F, Tong JY, Feng Q, Zhang JX (2015) Microstructural evolution and deformation features in gas turbine blades operated in-service. J Alloys Compd 618:728–733

    Article  CAS  Google Scholar 

  3. Kim DH, Kim JH, Sa JW, Lee YS, Park CK, Moon SI (2008) Stress rupture characteristics of Inconel 718 alloy for ramjet combustor. Mater Sci Eng A 483–484:262–265

    Article  Google Scholar 

  4. Wang Y, Shao WZ, Zhen L, Yang C, Zhang XM (2009) Tensile deformation behavior of superalloy 718 at elevated temperatures. J Alloys Compd 471:331–335

    Article  CAS  Google Scholar 

  5. Lingenfelter A (1989) Welding of Inconel 718—a historical review. In: Conference proceedings on superalloy 718—metallurgy and applications, TMS-AIME, Warrendale, 673–683

  6. Kennedy RL (2005) ‘Allvac 718Plus, superalloy for the next forty years. In: Proceedings of 6th international symposium on superalloys and various derivatives 718, 625, 706, 1–14

  7. Guédou JY, Fedorova T, Rösler J, Klöwer J, Gehrmann B, Choné J (2014) Development of a new 718-type Ni–Co superalloy family for high temperature applications at 750 °C. In: MATEC web of conferences 14, vol: 01003: 1–6

  8. Ou M, Ma Y, Ge H, Xing W, Zhou Y, Zheng S, Liu K (2018) Microstructure evolution and mechanical properties of a new cast Ni-base superalloy with various Ti contents. J Alloys Compd 735:193–201

    Article  CAS  Google Scholar 

  9. John JCL, DuPont N, Kiser Samuel D (2009) Welding metallurgy and weldability of nickel-base alloys. John Wiley & Sons Inc, Hoboken

    Google Scholar 

  10. Idowu∗ OA, Ojo OA, Chaturvedi MC (2007) Effect of heat input on heat affected zone cracking in laser welded ATI Allvac 718Plus superalloy. Mater Sci Eng A 454–455:389–397

    Article  Google Scholar 

  11. Arulmurugan B, Manikandan M (2017) Development of welding technology for improving the metallurgical and mechanical properties of 21st century nickel based superalloy 686. Mater Sci Eng A 691:126–140

    Article  CAS  Google Scholar 

  12. Shi Z, Dong J, Zhang M, Zheng L (2013) Solidification characteristics and segregation behavior of Ni-based superalloy K418 for auto turbocharger turbine. J Alloy Compd 571:168–177

    Article  CAS  Google Scholar 

  13. Yin H, Gao Y, Gu Y (2017) Evolution of the microstructure and microhardness of the welding joint of IN 740H alloy with IN 617 as filler metal. Mater Charact 127:288–295

    Article  CAS  Google Scholar 

  14. Seo S-M, Jeong H-W, Ahn Y-K, Yun DW, Lee J-H, Yoo Y-S (2014) A comparative study of quantitative microsegregation analyses performed during the solidification of the Ni-base superalloy CMSX-10. Mater Charact 89:43–55

    Article  CAS  Google Scholar 

  15. Paulonis DF, Oblak JM, Duvall DS (1969) Precipitation in nickel-base alloy 718. Trans ASM 62:611–622

    CAS  Google Scholar 

  16. Vishwakarma KR, Richards NL, Chaturvedi MC (2008) Microstructural analysis of fusion and heat affected zones in electron beam welded ALLVAC® 718PLUS™ superalloy. Mater Sci Eng A 480:517–528

    Article  Google Scholar 

  17. David SA, Vitek JM (1992) Principles of weld metal solidification and microstructures. In: Conference proceedings on trends in welding research, 147–152

  18. Janaki Ram GD, Venugopal Reddy A, Prasad Rao K, Reddy GM, Sarin Sundar JK (2005) Microstructure and tensile properties of Inconel 718 pulsed Nd-YAG laser welds. J Mater Process Technol 167(1):73–82

    Article  Google Scholar 

  19. Knornovsky GA, Cieslak MJ, Headley TJ, Romig AD Jr, Hammetter WF (1989) Inconel 718: a solidification diagram. Metall Trans A 20A:58–2149

    Google Scholar 

  20. Thompson RG, Mayo DE, Radhakrishann B (1991) A phase diagram approach to study liquation cracking in alloy 718. Metall Trans A 22A:67–557

    Google Scholar 

  21. Radhakrishna C, Prasad Rao K (1997) The formation and control of Laves phase in superalloy 718 welds. J Mater Sci 32:1977–1984. https://doi.org/10.1023/A:1018541915113

    Article  CAS  Google Scholar 

  22. Richards NL, Nakkalil R, Chaturvedi MC (1994) The influence of electron-beam welding parameters on heat-affected-zone microfissuring in INCOLOY 903. Metall Mater Trans A 25(8):1733–1745

    Article  Google Scholar 

  23. Ojo OA, Richards NL, Chaturvedi MC (2004) Liquation of various phases in HAZ during welding of cast Inconel* 738LC. Mater Sci Technol 20(8):1027–1034

    Article  CAS  Google Scholar 

  24. Rush MT, Colegrove PA, Zhang Z, Broad D (2012) Liquation and post-weld heat treatment cracking in Rene 80 laser repair welds. J Mater Process Technol 212(1):188–197

    Article  CAS  Google Scholar 

  25. Chauvet E, Kontis P, Jägle EA et al (2018) Hot cracking mechanism affecting a non-weldable Ni-based superalloy produced by selective electron beam melting. Acta Mater 142:82–94

    Article  CAS  Google Scholar 

  26. Jahangiri MR, Arabi H, Boutorabi SMA (2013) Development of wrought precipitation strengthened IN939 superalloy. Mater Sci Technol 28(12):1470–1478

    Article  Google Scholar 

  27. Ashby MF, Easterling KE (1982) A first report on diagrams for grain growth in welds. Acta Metall 30:78–1969

    Article  Google Scholar 

  28. Sidhu RK, Richards NL, Chaturvedi MC (2007) Post-weld heat treatment cracking in autogenous GTA welded cast Inconel 738LC superalloy. Mater Sci Technol 23(2):203–213

    Article  CAS  Google Scholar 

  29. Lim LC, Yi JZ, Liu N (2002) Mechanism of post-weld heat treatment cracking in Rene 80 nickel based superalloy. Mater Sci Technol 18(4):407–412

    Article  CAS  Google Scholar 

  30. Dix AW, Savage WF (1971) Factors influencing strain-age cracking in Inconel X-750. Weld J 50:247s–252s

    Google Scholar 

  31. Prager M, Shira CS (1968) Welding of precipitation-hardening nickel-base alloys. WRC Bull 128:1–55

    Google Scholar 

  32. Damodaram R, Raman SGS, Rao KP (2014) Effect of post-weld heat treatments on microstructure and mechanical properties of friction welded alloy 718 joints. Mater Des 53:954–961

    Article  CAS  Google Scholar 

  33. Lu L, Soda H, McLean A (2003) Microstructure and mechanical properties of Fe–Cr–C eutectic composites. Mater Sci Eng A 347:214–222

    Article  Google Scholar 

  34. Briggs R (1965) Molten-salt reactor program semiannual progress report. ORNL 3812:71–72

    Google Scholar 

  35. Wang Q, Sun DL, Na Y, Zhou Y, Han XL, Wang J (2011) Effects of TIG welding parameters on morphology and mechanical properties of welded joint of Ni-base superalloy. Proced Eng 10:37–41

    Article  Google Scholar 

Download references

Acknowledgements

The authors would like to sincerely thank Mr. Lei Shu and Mr. Zhanhui Du for providing the welding materials.

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Authors and Affiliations

  1. Institute of Metal Research, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang, China

    Jilin Xie, Yingche Ma, Weiwei Xing, Meiqiong Ou, Long Zhang & Kui Liu

  2. School of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, China

    Jilin Xie

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  1. Jilin Xie
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  2. Yingche Ma
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Correspondence to Yingche Ma or Kui Liu.

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Xie, J., Ma, Y., Xing, W. et al. Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process. J Mater Sci 54, 3558–3571 (2019). https://doi.org/10.1007/s10853-018-3081-y

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  • DOI: https://doi.org/10.1007/s10853-018-3081-y

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