Mechanical properties and microstructural evolution of nanocrystalline titanium at elevated temperatures
Mechanical properties and microstructural evolution of nanocrystalline titanium at elevated temperatures
An investigation was initiated to study the mechanical properties and microstructural evolution of nanocrystalline titanium in the temperature range of 473-923 K after processing by high-pressure torsion (HPT) under a pressure of 5.0 GPa for up to 10 turns. The results show there is a significant improvement in both the tensile strength and the ductility in nanocrystalline Ti by comparison with coarse-grained (CG) Ti at elevated temperatures. The strength of HPT-processed Ti drops to that of CG Ti at temperatures above 773 K because of grain growth. An investigation of the mechanical behaviour at elevated temperatures reveals an increasing-decreasing-increasing trend in the elongations to failure with increasing temperature. An elongation of >130% was achieved both at 673 K and above 773 K for the HPT-processed samples and this was significantly larger than for the CG Ti. The highest measured elongation was ~200% for the HPT-processed sample tested at 923 K. A good combination of strength and elongation to failure was achieved in the temperature range of 573-773 K after HPT processing.
358-366
Shahmir, Hamed
9d330616-d35d-4db0-96e8-26195ae1c511
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
4 July 2016
Shahmir, Hamed
9d330616-d35d-4db0-96e8-26195ae1c511
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Shahmir, Hamed, Pereira, Pedro H.R., Huang, Yi and Langdon, Terence G.
(2016)
Mechanical properties and microstructural evolution of nanocrystalline titanium at elevated temperatures.
Materials Science and Engineering: A, 669, .
(doi:10.1016/j.msea.2016.05.105).
Abstract
An investigation was initiated to study the mechanical properties and microstructural evolution of nanocrystalline titanium in the temperature range of 473-923 K after processing by high-pressure torsion (HPT) under a pressure of 5.0 GPa for up to 10 turns. The results show there is a significant improvement in both the tensile strength and the ductility in nanocrystalline Ti by comparison with coarse-grained (CG) Ti at elevated temperatures. The strength of HPT-processed Ti drops to that of CG Ti at temperatures above 773 K because of grain growth. An investigation of the mechanical behaviour at elevated temperatures reveals an increasing-decreasing-increasing trend in the elongations to failure with increasing temperature. An elongation of >130% was achieved both at 673 K and above 773 K for the HPT-processed samples and this was significantly larger than for the CG Ti. The highest measured elongation was ~200% for the HPT-processed sample tested at 923 K. A good combination of strength and elongation to failure was achieved in the temperature range of 573-773 K after HPT processing.
Text
Hamed-MSE2016-accepted manuscript.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 25 May 2016
e-pub ahead of print date: 26 May 2016
Published date: 4 July 2016
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 396028
URI: http://eprints.soton.ac.uk/id/eprint/396028
ISSN: 0921-5093
PURE UUID: c7b6c516-712c-41a5-ae8f-959eb2c6d3cf
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Date deposited: 02 Jun 2016 11:25
Last modified: 15 Mar 2024 05:37
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Author:
Hamed Shahmir
Author:
Pedro H.R. Pereira
Author:
Yi Huang
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