Skip to main content
Log in

Thermal stability of the structure of a heat-resistant cobalt alloy hardened with intermetallic γ'-phase precipitates

  • Promising Materials and Technologies
  • Published:
Russian Metallurgy (Metally) Aims and scope

Abstract

The thermal stability of the microstructure of a heat-resistant cobalt alloy, which consists of a γ solid solution strengthened with γ'-phase precipitates, has been studied. The temperature behavior of the dissolution of the hardening γ' phase and the kinetics of its coarsening at 700 and 800°C have been determined. It is found that, during prolonged annealing at 800°C, the γ' → β phase transformation occurs.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. Sato, T. Omori, K. Oikawa, I. Ohnuma, R. Kainuma, and K. Ishida, “Cobalt-base high-temperature alloys,” Science 312, 90–91 (2006).

    Article  Google Scholar 

  2. Q. Yao, H. Xing, and J. Sun, “Structural stability and elastic property of the L12 ordered Co3(Al, W) precipitate,” Appl. Phys. Lett. 89, 161906 (2006).

    Article  Google Scholar 

  3. A. Suzuki, G. C. DeNolf, and T. M. Pollock, “Flow stress anomalies two-phase Co–Al–W-base alloys,” Scr. Materialia 56 (5), 385–388 (2007).

    Article  Google Scholar 

  4. T. M. Pollock, J. Dibbern, M. Tsunekane, J. Zhu, and A. Suzuki, “New Co-based high-temperature alloys,” J. Min. Met. Mater. Soc. 62 (1), 58–63 (2010).

    Article  Google Scholar 

  5. M. Tsunekane, A. Suzuki, and T. M. Pollock, “Singlecrystal solidification of new Co–Al–W-base alloys,” Intermetallics 19, 636–643 (2011).

    Article  Google Scholar 

  6. A. Bauer, S. Neumeier, F. Pyczak, M. Singer, and M. Göoken, “Creep properties of different δ'-strengthened Co-base superalloys,” Mater. Sci. Eng. A 550, 333–341 (2012).

    Article  Google Scholar 

  7. A. Suzuki and T. M. Pollock, “High-temperature strength and deformation of δ' two-phase Co–Al–Wbase alloys,” Acta Materialia 56 (6), 1288–1297 (2008).

    Article  Google Scholar 

  8. S. Meher, S. Nag, J. Tiley, A. Goel, and R. Banerjee, “Coarsening kinetics of δ' precipitates in cobalt-base alloys,” Acta Materialia 61, 4266–4276 (2013).

    Article  Google Scholar 

  9. N. V. Petrushin, A. V. Logunov, and V. A. Gorin, “Structural stability of nickel heat-resistant alloys at high temperatures,” Metalloved. Term. Obrab. Mater., No. 5, 36–39 (1984).

    Google Scholar 

  10. N. V. Petrushin, A. V. Logunov, A. I. Kovalev, et al., Inventor’s certificate No. 687965, Byulet. Izobret., No. 10, 237 (1992).

    Google Scholar 

  11. U. Hemmersmeier and M. Feller-Kniepmeier, “Element distribution in the macro-and microstructure of nickel base superalloy CMSX-4,” Mater. Sci. Eng. A 248 (1–2), 87–97 (1998).

    Article  Google Scholar 

  12. C. Schulze and M. Feller-Kniepmeier, “Transmission electron microscopy of phase composition and lattice misfit in the Re-containing nickel-base superalloy CMSX-10,” Mater. Sci. Eng. A 281 (1–2), 204–212 (2000).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to N. V. Petrushin.

Additional information

Original Russian Text © A.I. Epishin, N.V. Petrushin, T. Link, G. Nolze, Yu.V. Loshchinin, G. Gerstein, 2015, published in Deformatsiya i Razrushenie Materialov, 2015, No. 3, pp. 17–22.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Epishin, A.I., Petrushin, N.V., Link, T. et al. Thermal stability of the structure of a heat-resistant cobalt alloy hardened with intermetallic γ'-phase precipitates. Russ. Metall. 2016, 286–291 (2016). https://doi.org/10.1134/S0036029516040078

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0036029516040078

Navigation