Skip to main content

Effects of heat input on the pitting resistance of Inconel 625 welds by overlay welding

Abstract

The objective of this study was to establish the relationship between the dilution ratio of the weld zone and pitting resistance depending on the heat input to welding of the Inconel alloy. Each specimen was produced by electroslag welding using Inconel 625 as the filler metal. In the weld zone of each specimen, dendrite grains were observed near the fusion line and equiaxed grains were observed on the surface. It was also observed that a melted zone with a high Fe content was formed around the fusion line, which became wider as the welding heat input increased. In order to evaluate the pitting resistance, potentiodynamic polarization tests and CPT tests were conducted. The results of these tests confirmed that there is no difference between the pitting resistances of each specimen, as the structures of the surfaces were identical despite the effect of the differences in the welding heat input for each specimen and the minor dilution effect on the surface.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    W. F. Smith, Structure and Properties of Engineering Alloy, 2 nd ed., pp. 493–538, Kyobo Books, Korea (2009).

    Google Scholar 

  2. 2.

    W. L. Mankins and S. Lamb, Nickel and Nickel Alloys, 10 th ed., p. 428, ASM International, USA (1990).

    Google Scholar 

  3. 3.

    G. P. Airey, Metallograghy, 13, 21 (1981).

    Article  Google Scholar 

  4. 4.

    R. A. Page and A. McMinn, Metall. Trans. A 17, 877 (1986).

    Article  Google Scholar 

  5. 5.

    J. J. Kai, G. P. Yu, C. H. Tsai, M. N. Liu, and S. C. Yao, Metall. Trans. A 20, 2057 (1989).

    Article  Google Scholar 

  6. 6.

    K. S. Kim, H. J. Lee, B. S. Lee, I. C. Jung, and K. S. Park, Nucl. Eng. Des. 239, 2771 (2009).

    Article  Google Scholar 

  7. 7.

    H. Xue, Z. Li, Z. Lu, and T. Shoji, Nucl. Eng. Des. 241, 731 (2011).

    Article  Google Scholar 

  8. 8.

    H.-J. Park and H.-W. Lee, Korean J. Met. Mater. 52, 211 (2014).

    Article  Google Scholar 

  9. 9.

    W. Wu and C. H. Tsai, Metall. Mater. Trans. A 30A(2), 417 (1999).

    Article  Google Scholar 

  10. 10.

    Y. T. Shin, H. S. Shin, and H. W. Lee, Met. Mater. Int. 18, 1037 (2012).

    Article  Google Scholar 

  11. 11.

    J. M. Kim and H. W. Lee, Met. Mater. Int. 20, 329 (2014).

    Article  Google Scholar 

  12. 12.

    J. M. Kim and H. W. Lee, Korean J. Met. Mater. 51, 829 (2013).

    Article  Google Scholar 

  13. 13.

    Li Jian, C. Y. Yuh, and M. Farooque, Corros. Sci. 42, 1573 (2000).

    Article  Google Scholar 

  14. 14.

    M. D. Mathew, P. Parameswaran, and K. Bhanu Sankara Rao, Mater. Charact. 59, 508 (2008).

    Article  Google Scholar 

  15. 15.

    D. E. Jordan, Weld world 4, 1 (1998).

    Google Scholar 

  16. 16.

    S. K. Rai, and A. Kumar, Scripta Mater. 51, 59 (2004).

    Article  Google Scholar 

  17. 17.

    Y. H. Lee and I. S. Kim, Wear 253, 438 (2002).

    Article  Google Scholar 

  18. 18.

    Y. S. Ahn, B. H. Yoon, H. J. Kim, and C. H. Lee, Met. Mater. Int. 8(5), 469 (2002).

    Article  Google Scholar 

  19. 19.

    T. E. Abioye, J. Folkes, and A. T. Clare, J. Mater. Process. Technol. 213, 2145 (2013).

    Article  Google Scholar 

  20. 20.

    H. R. Zareie Rajani, S. A. A. Akbari Mousavi, and F. Madani Sani, Mater. Des. 43, 467 (2013).

    Article  Google Scholar 

  21. 21.

    ASTM Standard G48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution, ASTM G-11 (Reapproved 2011).

    Google Scholar 

  22. 22.

    C. M. Lin, Surf. Coat. Technol. 228, 234 (2013).

    Article  Google Scholar 

  23. 23.

    ASTM Standard G46, Standard Guide for Examination and Evaluation of Pitting Corrosion, ASTM G46-94 (2005).

    Google Scholar 

  24. 24.

    J. B. Lee, Mater. Chem. Phys. 99, 224 (2006).

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Hae Woo Lee.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Kim, J.S., Park, Y.I. & Lee, H.W. Effects of heat input on the pitting resistance of Inconel 625 welds by overlay welding. Met. Mater. Int. 21, 350–355 (2015). https://doi.org/10.1007/s12540-015-4245-9

Download citation

Keywords

  • alloys
  • welding
  • corrosion
  • microstructure
  • scanning electron microscopy (SEM)