The origins of room temperature hardening of Al–Cu–Mg alloys
The origins of room temperature hardening of Al–Cu–Mg alloys
The most commonly cited mechanisms for the rapid age hardening of Al–Cu–Mg alloys at about 100–200 °C are hardening by Guinier–Preston B zone formation, formation of Cu–Mg co-clusters and a dislocation–solute interaction mechanism. New experiments on ageing–deformation–ageing cycles at room temperature indicate that no substantial additional age hardening occurs with the addition of deformation to the cycle, and hence, a dislocation–solute interaction mechanism appears unlikely. Instead, strengthening due to modulus hardening generated by the difference in shear modulus of Cu–Mg co-clusters and matrix is proposed as the main strengthening mechanism for room temperature hardening.
clusters, calorimetry, precipitation, Al–Cu–Mg alloys, natural ageing
222-226
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Yan, J.L.
5f230a2d-0201-41fb-8469-e6c9a95c03b7
2004
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Yan, J.L.
5f230a2d-0201-41fb-8469-e6c9a95c03b7
Starink, M.J., Gao, N. and Yan, J.L.
(2004)
The origins of room temperature hardening of Al–Cu–Mg alloys.
Materials Science and Engineering: A, 387-389 (1-2), .
(doi:10.1016/j.msea.2004.01.085).
Abstract
The most commonly cited mechanisms for the rapid age hardening of Al–Cu–Mg alloys at about 100–200 °C are hardening by Guinier–Preston B zone formation, formation of Cu–Mg co-clusters and a dislocation–solute interaction mechanism. New experiments on ageing–deformation–ageing cycles at room temperature indicate that no substantial additional age hardening occurs with the addition of deformation to the cycle, and hence, a dislocation–solute interaction mechanism appears unlikely. Instead, strengthening due to modulus hardening generated by the difference in shear modulus of Cu–Mg co-clusters and matrix is proposed as the main strengthening mechanism for room temperature hardening.
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Published date: 2004
Keywords:
clusters, calorimetry, precipitation, Al–Cu–Mg alloys, natural ageing
Organisations:
Engineering Sciences
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Local EPrints ID: 22850
URI: http://eprints.soton.ac.uk/id/eprint/22850
ISSN: 0921-5093
PURE UUID: 871d984e-15ee-43c2-a1f2-c498412cc6ca
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Date deposited: 23 Mar 2006
Last modified: 16 Mar 2024 03:21
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Author:
J.L. Yan
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