β-Ti grain refinement via α-Precipitation

Ghaderi, Alireza, Hodgson, Peter D. and Barnett, Matthew R. 2016, β-Ti grain refinement via α-Precipitation, Metallurgical and materials transactions a: physical metallurgy and materials science, vol. 47, no. 3, pp. 1322-1330, doi: 10.1007/s11661-015-3299-0.

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Title β-Ti grain refinement via α-Precipitation
Author(s) Ghaderi, AlirezaORCID iD for Ghaderi, Alireza orcid.org/0000-0002-6774-9302
Hodgson, Peter D.
Barnett, Matthew R.ORCID iD for Barnett, Matthew R. orcid.org/0000-0001-8287-9044
Journal name Metallurgical and materials transactions a: physical metallurgy and materials science
Volume number 47
Issue number 3
Start page 1322
End page 1330
Total pages 9
Publisher Springer
Place of publication New York, N.Y.
Publication date 2016-03
ISSN 1073-5623
Summary The present work explores the impact of α precipitates on β recrystallization following hot deformation of Ti-5Al-5Mo-5V-3Cr with grains larger than 1 mm. A single hot rolling pass of 36 pct reduction was conducted on an aged microstructure containing α precipitates at a temperature well below the β transus temperature. After annealing, a uniformly recrystallized structure with a grain size of ~100 µm is formed. The prior β grain boundaries can be readily identified and it is seen that the primary β grains have been replaced by grains displaying a spread of correlated misorientation angles extending up to the highest allowable values. The annealing comprises two stages. The first stage involves normal β subgrain growth limited by the Zener pinning force of the unstable α precipitates. The second stage corresponds to the onset of β recrystallization at the point where the Zener pinning force drops due to dissolution of the α precipitates. This leads to a uniform distribution of site saturated recrystallization nuclei.
Language eng
DOI 10.1007/s11661-015-3299-0
Field of Research 0912 Materials Engineering
0306 Physical Chemistry (Incl. Structural)
0913 Mechanical Engineering
091207 Metals and Alloy Materials
Socio Economic Objective 861206 Structural Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081057

Document type: Journal Article
Collection: Institute for Frontier Materials
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