| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 04003 | |
| Number of page(s) | 7 | |
| Section | Aerospace Applications | |
| DOI | https://doi.org/10.1051/matecconf/202032104003 | |
| Published online | 12 October 2020 | |
The Role of Oxygen in α2 Formation in the Titanium Model Alloy Ti-7Al
1 Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
2 Rolls-Royce plc, Derby, DE24 8BJ, United Kingdom
* Corresponding Author: hazel.gardner@materials.ox.ac.uk
The mechanical and microstructural response of a model Ti-7wt.%Al alloy doped with 500 wppm oxygen has been examined in detail as a function of ageing. Three ageing conditions, ice-water quenched, and aged at 550 oC for 10 or 49 days were examined in detail as a function of ageing. Nanoindentation was used to measure hardness as a function of ageing, while Atom Probe Tomography (APT) also revealed α2 precipitation in the aged samples. The partitioning pReference of oxygen to the α matrix instead of the α2 precipitates has been directly measured.
© The Authors, published by EDP Sciences, 2020
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