Effects of equal-channel angular pressing and accumulative roll-bonding on hydrogen storage properties of a commercial ZK60 magnesium alloy
Effects of equal-channel angular pressing and accumulative roll-bonding on hydrogen storage properties of a commercial ZK60 magnesium alloy
The hydrogen storage properties of a commercial ZK60 magnesium alloy were investigated after processing by equal-channel angular pressing (ECAP) and accumulative roll-bonding (ARB). Samples were prepared by 6 passes of ECAP and subsequently rolled 25 times. Microstructural characterization was performed using scanning and transmission electron microscopy. The kinetics of hydrogen absorption and desorption were measured in a Sievert-type apparatus. Processing only by ECAP resulted in a very low hydrogen storage capacity of 0.5 wt. %. Additional processing by ARB refined the microstructure and improved the hydrogen absorption. Despite this improvement, the hydrogen capacity was limited to less than 4 wt. %. This limitation was overcome by crushing the materials into small thin plates. The crushed sample from the ECAP material absorbed 4.77 wt. % of hydrogen in 24 h while the capacity of the sample processed by ECAP and ARB was 6.4 wt. %. The results are discussed in terms of morphology and microstructure of the samples.
hyrogen storage, magnesium alloys, severe plastic deformation
16971-16976
Asselli, A.A.C.
345d30d1-9c91-4450-8658-0b852fe5f802
Leiva, D.R.
8d3e9824-0418-4b32-9e66-48da1850cc7d
Huot, J.
67c87f14-93e1-4983-ab2d-e3d8dbf808a0
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Botta, W.J.
36cb2d92-3dd0-4535-b3b7-a1ec369d4680
21 December 2015
Asselli, A.A.C.
345d30d1-9c91-4450-8658-0b852fe5f802
Leiva, D.R.
8d3e9824-0418-4b32-9e66-48da1850cc7d
Huot, J.
67c87f14-93e1-4983-ab2d-e3d8dbf808a0
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Botta, W.J.
36cb2d92-3dd0-4535-b3b7-a1ec369d4680
Asselli, A.A.C., Leiva, D.R., Huot, J., Kawasaki, M., Langdon, T.G. and Botta, W.J.
(2015)
Effects of equal-channel angular pressing and accumulative roll-bonding on hydrogen storage properties of a commercial ZK60 magnesium alloy.
[in special issue: 1st International Conference on Hydrogen Storage, Embrittlement and Applications (Hy-SEA 2014), 26-30 October 2014, Rio de Janeiro, Brazil]
International Journal of Hydrogen Energy, 40 (47), .
(doi:10.1016/j.ijhydene.2015.05.149).
Abstract
The hydrogen storage properties of a commercial ZK60 magnesium alloy were investigated after processing by equal-channel angular pressing (ECAP) and accumulative roll-bonding (ARB). Samples were prepared by 6 passes of ECAP and subsequently rolled 25 times. Microstructural characterization was performed using scanning and transmission electron microscopy. The kinetics of hydrogen absorption and desorption were measured in a Sievert-type apparatus. Processing only by ECAP resulted in a very low hydrogen storage capacity of 0.5 wt. %. Additional processing by ARB refined the microstructure and improved the hydrogen absorption. Despite this improvement, the hydrogen capacity was limited to less than 4 wt. %. This limitation was overcome by crushing the materials into small thin plates. The crushed sample from the ECAP material absorbed 4.77 wt. % of hydrogen in 24 h while the capacity of the sample processed by ECAP and ARB was 6.4 wt. %. The results are discussed in terms of morphology and microstructure of the samples.
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Accepted/In Press date: 23 May 2015
e-pub ahead of print date: 12 June 2015
Published date: 21 December 2015
Keywords:
hyrogen storage, magnesium alloys, severe plastic deformation
Organisations:
Engineering Mats & Surface Engineerg Gp, Engineering Science Unit, Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 386311
URI: http://eprints.soton.ac.uk/id/eprint/386311
ISSN: 0360-3199
PURE UUID: 22f3faef-760b-4fa8-9578-342ea64eeee7
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Date deposited: 29 Jan 2016 16:48
Last modified: 15 Mar 2024 03:14
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Contributors
Author:
A.A.C. Asselli
Author:
D.R. Leiva
Author:
J. Huot
Author:
M. Kawasaki
Author:
W.J. Botta
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