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The influence of interstitial oxygen on the alpha to omega phase transition in titanium and zirconium

  • Ellen Kathleen Cerreta
  • , George Thompson Gray
  • , A. C. Lawson
  • , C. E. Morris
  • , R. S. Hixson
  • , P. A. Rigg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

The pressure for the α to ω phase transition was investigated for two grades of titanium and three grades of zirconium. A series of shock experiments were conducted from 5 to 35GPa and revealed that the pressure for the phase transition increases with increasing interstitial oxygen content and is completely suppressed in low purity materials. For the high purity Ti and Zr in this study, the pressure for the phase transition occurred at 10.4 and 7.1GPa, respectively and no reverse transformation was observed upon unloading. Increasing the oxygen content increases the number of octahedral sites occupied; this is postulated to increase the pressure for the phase transition. Neutron diffraction was utilized to quantify the volume fraction of metastable ω phase and to characterize the microstructures within the high purity, shocked, and "soft" recovered specimens.

Original languageEnglish
Title of host publicationSHOCK COMPRESSION OF CONDENSED MATTER - 2005
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages1149-1152
Number of pages4
DOIs
StatePublished - Dec 1 2006
EventSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter -
Duration: Dec 1 2006 → …

Publication series

NameAIP Conference Proceedings
Volume845 II
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Period12/1/06 → …

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