An evaluation of the hexagonal close-packed to face-centered cubic phase transformation in a Ti-6Al-4V alloy during high-pressure torsion
An evaluation of the hexagonal close-packed to face-centered cubic phase transformation in a Ti-6Al-4V alloy during high-pressure torsion
A Ti-6Al-4V alloy was used to examine the effect of martensitic (αʹ) or lamellar (α+β) microstructures on grain refinement and the hcp to fcc phase transformation during HPT processing. There was significant grain refinement with grain sizes of ~30 and ~40 nm in the αʹ and α+β microstructures, respectively, and with the occurrence of an allotropic hcp to fcc phase transformation in the αʹ sample after HPT. A high volume fraction of boundaries, together with a substructure containing initial defects of the martensitic sample, promotes the formation of the fcc phase during the HPT processing.
212-217
Shahmir, Hamed
9d330616-d35d-4db0-96e8-26195ae1c511
Langdon, Terence
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
17 September 2017
Shahmir, Hamed
9d330616-d35d-4db0-96e8-26195ae1c511
Langdon, Terence
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Shahmir, Hamed and Langdon, Terence
(2017)
An evaluation of the hexagonal close-packed to face-centered cubic phase transformation in a Ti-6Al-4V alloy during high-pressure torsion.
Materials Science and Engineering: A, 704, .
(doi:10.1016/j.msea.2017.07.099).
Abstract
A Ti-6Al-4V alloy was used to examine the effect of martensitic (αʹ) or lamellar (α+β) microstructures on grain refinement and the hcp to fcc phase transformation during HPT processing. There was significant grain refinement with grain sizes of ~30 and ~40 nm in the αʹ and α+β microstructures, respectively, and with the occurrence of an allotropic hcp to fcc phase transformation in the αʹ sample after HPT. A high volume fraction of boundaries, together with a substructure containing initial defects of the martensitic sample, promotes the formation of the fcc phase during the HPT processing.
Text
Hamed-MSE 2017 accepted manuscript
- Accepted Manuscript
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Accepted/In Press date: 31 July 2017
e-pub ahead of print date: 2 August 2017
Published date: 17 September 2017
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Local EPrints ID: 413046
URI: http://eprints.soton.ac.uk/id/eprint/413046
ISSN: 0921-5093
PURE UUID: 2d33b5ae-b25f-4afb-a708-e8c0cf325d47
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Date deposited: 14 Aug 2017 16:30
Last modified: 16 Mar 2024 05:36
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Author:
Hamed Shahmir
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