Examining the effect of the aging state on strength and plasticity of wrought aluminum alloys
Examining the effect of the aging state on strength and plasticity of wrought aluminum alloys
A general rule of strength and plasticity is proposed for three typical wrought Al alloys (2xxx, 6xxx, and 7xxx) subjected to different aging times. Investigations of the work-hardening processes and dislocation configurations in tensile and compressive testing reveal that this general rule arises because there is a common mechanism for these three kinds of wrought alloys whereby the tendency for cross-slip increases monotonously with aging time. By analyzing the strain hardening exponent and the stacking fault energy, it is demonstrated that the change in the dislocation slip mode is attributed mainly to the formation of second phases rather than to the matrix composition. Accordingly, a new work-hardening model is proposed for wrought Al alloys containing second phases and this explains the interaction between dislocations and second phases and other relevant experimental phenomena. This study is therefore beneficial for quantitatively investigating and optimizing the strength and plasticity of wrought aluminum alloys.
Wrought aluminum alloy, Strength and plasticity, Work hardening, Dislocation slip mode, Second phase
54-67
Qu, Z
e372c60e-d7e8-4718-8f5e-ef156b6914a3
Zhang, Z.J.
5e743724-cb9c-4241-912a-491d8900902d
Yan, J X
f7aeb3c0-8f87-4cc9-beff-e0e425c94241
Gong, B S
3e94d10b-6adc-438c-82ba-adf3c99b2b66
Lu, S L
fd554281-c200-4922-a7a4-63b422dceeeb
Zhang, P.
58020138-8fa1-4555-b886-32df14964cfa
Zhang, Z.F.
dbbe4276-c9d7-407d-bb78-ea7d9aab084a
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
20 September 2022
Qu, Z
e372c60e-d7e8-4718-8f5e-ef156b6914a3
Zhang, Z.J.
5e743724-cb9c-4241-912a-491d8900902d
Yan, J X
f7aeb3c0-8f87-4cc9-beff-e0e425c94241
Gong, B S
3e94d10b-6adc-438c-82ba-adf3c99b2b66
Lu, S L
fd554281-c200-4922-a7a4-63b422dceeeb
Zhang, P.
58020138-8fa1-4555-b886-32df14964cfa
Zhang, Z.F.
dbbe4276-c9d7-407d-bb78-ea7d9aab084a
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Qu, Z, Zhang, Z.J., Yan, J X, Gong, B S, Lu, S L, Zhang, P., Zhang, Z.F. and Langdon, Terence G
(2022)
Examining the effect of the aging state on strength and plasticity of wrought aluminum alloys.
Journal of Materials Science and Technology, 122, .
(doi:10.1016/j.jmst.2021.11.075).
Abstract
A general rule of strength and plasticity is proposed for three typical wrought Al alloys (2xxx, 6xxx, and 7xxx) subjected to different aging times. Investigations of the work-hardening processes and dislocation configurations in tensile and compressive testing reveal that this general rule arises because there is a common mechanism for these three kinds of wrought alloys whereby the tendency for cross-slip increases monotonously with aging time. By analyzing the strain hardening exponent and the stacking fault energy, it is demonstrated that the change in the dislocation slip mode is attributed mainly to the formation of second phases rather than to the matrix composition. Accordingly, a new work-hardening model is proposed for wrought Al alloys containing second phases and this explains the interaction between dislocations and second phases and other relevant experimental phenomena. This study is therefore beneficial for quantitatively investigating and optimizing the strength and plasticity of wrought aluminum alloys.
Text
Zhefeng-Manuscript-final-docx
- Accepted Manuscript
More information
Accepted/In Press date: 20 November 2021
e-pub ahead of print date: 12 March 2022
Published date: 20 September 2022
Keywords:
Wrought aluminum alloy, Strength and plasticity, Work hardening, Dislocation slip mode, Second phase
Identifiers
Local EPrints ID: 454130
URI: http://eprints.soton.ac.uk/id/eprint/454130
PURE UUID: 7138041b-df27-4196-8628-98526344598a
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Date deposited: 01 Feb 2022 17:38
Last modified: 17 Mar 2024 07:02
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Contributors
Author:
Z Qu
Author:
Z.J. Zhang
Author:
J X Yan
Author:
B S Gong
Author:
S L Lu
Author:
P. Zhang
Author:
Z.F. Zhang
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