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Influence of long-term aging and superimposed creep stress on the microstructure of 2.25cr-1Mo steel

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Abstract

To understand the influence of high-temperature aging and superimposed creep stress on the microstructural variations in a 2.25Cr-1Mo steel, the shoulder and gage portions of the specimens subjected to stress-rupture tests at 540 °C and 580 °C have been studied by transmission electron microscopy. In the normalized and tempered condition, the steel exhibited a tempered bainitic structure and the carbides were present as M3C globules, M2C platelets, and M23C6 rectangular parallelepipeds. Aging the steel at 540 °C for 7022 hours or 17,946 hours resulted in considerable coarsening of M2C and caused precipitation of M6C carbides. The superimposed creep stress enhanced the M2C precipitation. The ferrite matrix exhibited some recovery in the specimens exposed for 17,946 hours. While M2C platelets were observed in a few areas after 14,836 hours of aging at 580 °C, this carbide was virtually nonexistent when a stress of 78 MPa was superimposed. Amounts of M23C6 persisted throughout the tests at both 540 °C and 580 °C. The M6C carbide became more predominant after long exposure at 580 °C. The ferrite matrix recovered considerably in specimens subjected to creep stress at 580 °C for 14,836 hours.

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References

  1. R.G. Baker and J. Nutting:J. Iron Steel Inst., 1959, vol. 192, pp. 257–68.

    CAS  Google Scholar 

  2. Teruo Yukitoshi and K. Nishida:Trans. ISIJ, 1972, vol. 12, pp. 283–90.

    CAS  Google Scholar 

  3. M.C. Murphy and G.D. Branch:J. Iron Steel Inst., 1971, vol. 209, pp. 546–61.

    CAS  Google Scholar 

  4. K. Suzuki, T. Muta, and T. Hirota:Trans. ISIJ, 1971, vol. 11, pp. 1–8.

    CAS  Google Scholar 

  5. V.A. Varin and J. Haftek:Mater. Sci. Eng., 1984, vol. 62, pp. 192–206.

    Google Scholar 

  6. V.A. Biss and T. Wada:Metall. Trans. A, 1985, vol. 16A, pp. 109–14.

    CAS  Google Scholar 

  7. K.T. Kurzydlowski and W. Zielinski:Met. Sci., 1984, vol. 18, pp. 223–24.

    Article  CAS  Google Scholar 

  8. T. Wada and V.A. Biss:Metall. Trans. A, 1983, vol. 14A, pp. 845–55.

    Google Scholar 

  9. T.W. Evans, J.D. Parkar, and B. Wilshire: inRecent Advances in Creep and Fracture of Engineering Materials and Structurais, B. Wilshire and D.R.J. Owen, eds., Pineridge, Swansea, United Kingdom, 1982, pp. 141–67.

    Google Scholar 

  10. A.M. Abdul-Latif, I.M. Corbelt, and D.M.R. Taplin:Met. Sci., 1982, vol. 16 (2), pp. 90–116.

    Google Scholar 

  11. B.J. Cane and J. A. Williams:Int. Mater. Rev., 1987, vol. 32 (5), pp. 241–62.

    CAS  Google Scholar 

  12. B.A. Senior:Mater. Sci. Eng., 1988, vol. 103A, pp. 263–71.

    Google Scholar 

  13. N. Gope, T. Mukherjee, and D.S. Sarma:Metall. Trans. A, 1992, vol. 23A, pp. 221–35.

    CAS  Google Scholar 

  14. N. Gope, T. Mukherjee, and D.S. Sarma:Mater. Trans. JIM, 1992, vol. 33 (2), pp. 110–19.

    CAS  Google Scholar 

  15. N. Gope, T. Mukherjee, and D.S. Sarma:Metall. Trans. A, 1992, vol. 23A, pp. 2191–2202.

    Google Scholar 

  16. N. Gope, S. Sharma, Amit Chatterjee, and P.K. Chakravarty:Tool and Alloy Steels, 1987, vol. 12 (4), pp. 111–19.

    Google Scholar 

  17. N. Gope, S. Sharma, Amit Chatterjee, and P.K. Chakravarty:Creep Resistant Steels for Power Plant, Symp. Preprint, BHEL Corporate, R & D, Hyderabad, India, 1983, pp. II-6-1 to II-6-15.

    Google Scholar 

  18. N. Gope, S. Sharma, and P.K. Chakravarty:Trans. Indian Institute of Metals, 1984, vol. 37 (5), pp. 640–45.

    CAS  Google Scholar 

  19. K.W. Andrews, D.J. Dyson, and S.R. Keown:Interpretation of Electron Diffraction Patterns, Adam Hilger, London, 1971, p. 9.

    Google Scholar 

  20. John Pilling and N. Ridley:Metall. Trans. A, 1982, vol. 13A, pp. 557–63.

    Google Scholar 

  21. T. Wada:Changes in Microstructure and Tensile Strength of Cr-Mo Steels after Long Term Service Exposure (Pamphlet), 8505-052 Metals/Materials Technology Series, ASM, Metals Park, OH, 1985.

    Google Scholar 

  22. T. Mukherjee:Materials for Metal Cutting, ISI Special Report No. 126, 1970, The Iron & Steel Institute, London, pp. 79–96.

    Google Scholar 

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Gope, N., Chatterjee, A., Mukherjee, T. et al. Influence of long-term aging and superimposed creep stress on the microstructure of 2.25cr-1Mo steel. Metall Trans A 24, 315–326 (1993). https://doi.org/10.1007/BF02657318

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  • DOI: https://doi.org/10.1007/BF02657318

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