Metallurgical Transactions

, Volume 4, Issue 12, pp 2701–2708 | Cite as

The ω-phase as an example of an unusual shear transformation

  • J. C. Williams
  • D. de Fontaine
  • N. E. Paton
Symposimum on Phase Transformation in Less Common Metals: A Dialogue


The conditions leading to formation of the metastable ω-phase in Ti, Zr, and Hf alloys are described and earlier experimental observations directly related to ω -phase formation are summarized. New experimental results are presented which show that increased oxygen content suppresses athermal ω-phase formation in Ti-V alloys. A mechanism of ω-phase formation based on the formation of a linear displacement defect is described and it is shown that both the earlier and new experimental results are consistent with this mechanism. Additional experimental results on variations in electrical and physical properties in Ti alloys are also shown to be consistent with the linear displacement defect model.


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Copyright information

© American Society for Metals, The Melallurgical Society of AIME 1973

Authors and Affiliations

  • J. C. Williams
    • 1
  • D. de Fontaine
    • 2
  • N. E. Paton
    • 1
  1. 1.Physical Metallurgy and Materials GroupScience Center, Rockwell InternationalThousand Oaks
  2. 2.Department of Materials ScienceUniversity of California at Los AngelesLos Angeles

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