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Omega phase formation in RMI (38-6-44) beta titanium alloy

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Abstract

The stabilized beta titanium alloy RMI (38-6-44) was designed to limit the formation of omega-phase during quenching and subsequent ageing. It has been shown in the present paper, however, that both athermal and thermal omega do form and that the growth kinetics of the thermal omega follows aD=Ct 0.45 relationship.

As expected from the alloy additions, the maximum volume fraction of omega phase observed is considerably less than in other beta titanium alloys and the severe embrittlement due to omega phase formation is not a serious problem in this alloy. This is an important consideration for engineering applications in the service temperature range below 900‡F (480‡C).

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Authors and Affiliations

  1. Department of Metallurgical Engineering and Materials Science, University of Kentucky, Lexington, Kentucky, USA

    Gordon A. Sargent, H. Huang & R. J. De Angelis

Authors
  1. Gordon A. Sargent
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  2. H. Huang
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  3. R. J. De Angelis
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Sargent, G.A., Huang, H. & De Angelis, R.J. Omega phase formation in RMI (38-6-44) beta titanium alloy. J Mater Sci 9, 487–490 (1974). https://doi.org/10.1007/BF00737852

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  • DOI: https://doi.org/10.1007/BF00737852

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