Hydrogen embrittlement in super duplex stainless steels
Hydrogen embrittlement in super duplex stainless steels
In super duplex stainless steels (SDSSs), both austenite and ferrite are susceptible to hydrogen embrittlement, however there is a lack of understanding into the effect of hydrogen in each phase. In this study, in neutron diffraction was applied on hydrogen-charged (H-charged) samples to investigate the hydrogen embrittlement behaviour in super duplex stainless steels. The result reveals that austenite maintains good plasticity during tensile testing, whilst a loss of it is realised in ferrite. Fractography analysis reveals the diffusion of hydrogen induced a brittle-to-ductile transition from the sample surface towards the centre; hydrogen embrittlement vanishes as the specimen's centre is approached, while it is demonstrated to disappear first in austenite but not in ferrite. This transition can be predicted by applying a physics-based hydrogen embrittlement model which incorporates the effects of hydrogen concentration, hydrogen diffusivity, residual stress, loading state and temperature. The present work demonstrates the dissimilar susceptibility of austenite and ferrite to hydrogen embrittlement, providing a tool to describe it.
Crack propagation, Hydrogen embrittlement, Neutron diffraction, Super duplex stainless steel (SDSS)
Liang, X.Z.
a3a45c11-e85d-43e7-82a7-15192ec48bd2
Zhao, G.-H.
45ee7dab-554f-4884-b778-289b18f21145
Dodge, M.F.
1a21a223-f364-448a-833d-1adb004e0321
Lee, T.L.
1e15dd6c-5808-43b9-94aa-22a79001ac27
Dong, H.B.
24bb8c6e-506a-457f-927b-8cdc14dc7d78
Rivera-Díaz-del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
18 November 2019
Liang, X.Z.
a3a45c11-e85d-43e7-82a7-15192ec48bd2
Zhao, G.-H.
45ee7dab-554f-4884-b778-289b18f21145
Dodge, M.F.
1a21a223-f364-448a-833d-1adb004e0321
Lee, T.L.
1e15dd6c-5808-43b9-94aa-22a79001ac27
Dong, H.B.
24bb8c6e-506a-457f-927b-8cdc14dc7d78
Rivera-Díaz-del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Liang, X.Z., Zhao, G.-H., Dodge, M.F., Lee, T.L., Dong, H.B. and Rivera-Díaz-del-Castillo, P.E.J.
(2019)
Hydrogen embrittlement in super duplex stainless steels.
Materialia, 9, [100524].
(doi:10.1016/j.mtla.2019.100524).
Abstract
In super duplex stainless steels (SDSSs), both austenite and ferrite are susceptible to hydrogen embrittlement, however there is a lack of understanding into the effect of hydrogen in each phase. In this study, in neutron diffraction was applied on hydrogen-charged (H-charged) samples to investigate the hydrogen embrittlement behaviour in super duplex stainless steels. The result reveals that austenite maintains good plasticity during tensile testing, whilst a loss of it is realised in ferrite. Fractography analysis reveals the diffusion of hydrogen induced a brittle-to-ductile transition from the sample surface towards the centre; hydrogen embrittlement vanishes as the specimen's centre is approached, while it is demonstrated to disappear first in austenite but not in ferrite. This transition can be predicted by applying a physics-based hydrogen embrittlement model which incorporates the effects of hydrogen concentration, hydrogen diffusivity, residual stress, loading state and temperature. The present work demonstrates the dissimilar susceptibility of austenite and ferrite to hydrogen embrittlement, providing a tool to describe it.
Text
1-s2.0-S2589152919303205-main
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Accepted/In Press date: 1 November 2019
e-pub ahead of print date: 5 November 2019
Published date: 18 November 2019
Keywords:
Crack propagation, Hydrogen embrittlement, Neutron diffraction, Super duplex stainless steel (SDSS)
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Local EPrints ID: 492236
URI: http://eprints.soton.ac.uk/id/eprint/492236
PURE UUID: 8cc12257-ca79-4e42-8b1b-f8cd0aae51d2
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Date deposited: 22 Jul 2024 17:00
Last modified: 23 Jul 2024 02:08
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Contributors
Author:
X.Z. Liang
Author:
G.-H. Zhao
Author:
M.F. Dodge
Author:
T.L. Lee
Author:
H.B. Dong
Author:
P.E.J. Rivera-Díaz-del-Castillo
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