Journal article
The effect of oxidation on the subsurface microstructure of a Ti-6Al-4V alloy
- Abstract:
- Atom Probe Tomography (APT) and Transmission Electron Microscopy (TEM) are combined for examining α-case formation in Ti-6Al-4V, generated by air exposure at 800°C. Below the oxide surface, the microstructure separates into a nanoscale mixture of the α-Ti and α2 Ti3Al phases, of compositions Ti70-O30 and Ti65-O10-Al20-V5 respectively. The α2 phase exists either as bands or as nanoscale spherical precipitates. Nitrogen also penetrates the surface, but to a lesser extent, whilst vanadium partitions to α2 or in distinctly separate phases. The results demonstrate that oxygen stimulates precipitation of α2, helping to explain embrittlement produced in the O-enriched layer beneath the oxide.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 543.0KB, Terms of use)
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- Publisher copy:
- 10.1016/j.scriptamat.2018.01.015
Authors
- Publisher:
- Elsevier
- Journal:
- Scripta Materialia More from this journal
- Volume:
- 148
- Pages:
- 24–28
- Publication date:
- 2018-02-09
- Acceptance date:
- 2018-01-11
- DOI:
- ISSN:
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1359-6462
- Keywords:
- Pubs id:
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pubs:817887
- UUID:
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uuid:529c65f0-e262-40bc-b926-5876bef9d668
- Local pid:
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pubs:817887
- Source identifiers:
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817887
- Deposit date:
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2018-01-12
- ARK identifier:
Terms of use
- Copyright holder:
- Acta Materialia Inc
- Copyright date:
- 2018
- Notes:
- Copyright © 2018 Acta Materialia Inc. Published by Elsevier Ltd. This is the accepted manuscript version of the article. The final version is available online from Elsevier at: https://doi.org/10.1016/j.scriptamat.2018.01.015
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