Skip to main content
SpringerLink
Log in

Study of the phase transformation of cobalt

  • Published:
Journal of Phase Equilibria

Abstract

The allotropic transformation of cobalt was studied with a differential scanning calorimeter. The temperatures of the fcc to hep transformation, As, and fcc to hcp transformation, Ms, exhibit a linear dependence on the heating and cooling rates: As(K) = 723.2 + 0.28R and Ms(K) = 671.4-0.28R whereR is the rate in K/min. As, Ms, and the associated enthalpies of the phase changes were observed to increase with increasing number of cycles through the transformation. The Ms reaction was observed to proceed slowly isothermally while exhibiting athermal behavior when cooled rapidly.

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

Access this article

Log in via an institution

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

Cited References

  1. T. Nishizawa and K. Ishida,Bull. Alloy Phase Diagrams, 4(4), 387–390, 420(1980).

    Article  Google Scholar 

  2. A.E. Ray, A.T. Biennann, R.S. Hanner, and J.E. Davison,Cobalt,1973, Part 4, 103–106(1973).

  3. R.E. Reed-Hill,Physical Metallurgy Principles, 2nd Ed., D. Van Nostrand, New York, 642(1973).

Download references

Author information

Authors and Affiliations

  1. University of Dayton Research InstituteDayton, 45469-0170, OH

    A.E Ray & S.R Smith

  2. Aero Propulsion and Power DirectorateWright Laboratory, Wright-Patterson Air Force Base, WL/POOC-2, 45433- 6563, OH

    J.D Scofield

Authors
  1. A.E Ray
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S.R Smith
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. J.D Scofield
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ray, A., Smith, S. & Scofield, J. Study of the phase transformation of cobalt. JPE 12, 644–647 (1991). https://doi.org/10.1007/BF02645161

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02645161

Keywords

Search

Navigation