The corrosion behaviour of commercial purity titanium processed by high-pressure torsion
The corrosion behaviour of commercial purity titanium processed by high-pressure torsion
Commercial purity (CP) titanium was processed by high-pressure torsion (HPT) under an applied pressure of 6.0 GPa for different numbers of torsional revolutions and then exposed to a 3.5 % NaCl solution for open-circuit potential measurements followed by electrochemical impedance spectroscopy and potentiodynamic polarization tests. The electrochemical results exhibit a complicated relationship between the corrosion resistance and grain refinement. Thus, microhardness measurements reveal an improvement in hardness for CP titanium after processing by HPT but the corrosion resistance is lower in the NaCl solution than for the annealed coarse-grained Ti. It is shown that the corrosion susceptibility of the HPT-processed samples decreases with increasing torsional strain. The effect of grain size and microstructure on the corrosion properties of ultrafine-grained CP Ti is also examined.
Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Qu, Minghong
22d9ef19-022a-4b47-b8d3-8561fb028288
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Wharton, J A
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
3 January 2014
Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Qu, Minghong
22d9ef19-022a-4b47-b8d3-8561fb028288
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Wharton, J A
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Nie, Mengyan, Wang, Chuan Ting, Qu, Minghong, Gao, N., Wharton, J A and Langdon, Terence G.
(2014)
The corrosion behaviour of commercial purity titanium processed by high-pressure torsion.
Journal of Materials Science.
(doi:10.1007/s10853-013-7988-z).
Abstract
Commercial purity (CP) titanium was processed by high-pressure torsion (HPT) under an applied pressure of 6.0 GPa for different numbers of torsional revolutions and then exposed to a 3.5 % NaCl solution for open-circuit potential measurements followed by electrochemical impedance spectroscopy and potentiodynamic polarization tests. The electrochemical results exhibit a complicated relationship between the corrosion resistance and grain refinement. Thus, microhardness measurements reveal an improvement in hardness for CP titanium after processing by HPT but the corrosion resistance is lower in the NaCl solution than for the annealed coarse-grained Ti. It is shown that the corrosion susceptibility of the HPT-processed samples decreases with increasing torsional strain. The effect of grain size and microstructure on the corrosion properties of ultrafine-grained CP Ti is also examined.
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Published date: 3 January 2014
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Local EPrints ID: 361203
URI: http://eprints.soton.ac.uk/id/eprint/361203
ISSN: 0022-2461
PURE UUID: fc24a982-b0b6-4b38-a0f6-2eedffe66d15
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Date deposited: 15 Jan 2014 18:17
Last modified: 15 Mar 2024 03:13
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Author:
Mengyan Nie
Author:
Chuan Ting Wang
Author:
Minghong Qu
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