Precipitation of the ordered α2 phase in a near-α titanium alloy

A. Radecka, J. Coakley, V. A. Vorontsov, T. L. Martin, P. A J Bagot, M. P. Moody, D. Rugg, D. Dye*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

19 Citations (Scopus)
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Abstract

Precipitate evolution in a near-α alloy was studied using transmission electron microscopy (TEM) and correlative atom probe tomography (APT) after ageing at 550-700 for times up to 28 days. It is found that precipitation occurs much faster and is more prolific in samples heat treated at higher temperatures. Particles were spherical after ageing at 550 °C, while after ageing at 700 °C they become ellipsoids with the major axis lying close to the [0001] direction. At longer ageing times, the α2 precipitates were found to contain greater amounts of Sn + Si, indicating that Sn and Si are stronger Ti3(Al,Sn,Si) formers than Al.

Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalScripta Materialia
Volume117
Early online date10 Mar 2016
DOIs
Publication statusPublished - 1 May 2016

Keywords

  • Atom probe tomography
  • Precipitation
  • Titanium alloys
  • Transmission electron microscopy (TEM)

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    Radecka, A., Coakley, J., Vorontsov, V. A., Martin, T. L., Bagot, P. A. J., Moody, M. P., Rugg, D., & Dye, D. (2016). Precipitation of the ordered α2 phase in a near-α titanium alloy. Scripta Materialia, 117, 81-85. https://doi.org/10.1016/j.scriptamat.2016.02.015