Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs: II. Modelling of yield strength
Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs: II. Modelling of yield strength
A detailed quantitative model for the strengthening of monolithic alloys and composites due to precipitation strengthening, solution strengthening, grain and subgrain strengthening, strengthening by dislocations and load transfer to ceramic inclusions is presented. The model includes a newly derived description of the effect of a precipitate free zone (PFZ) around the reinforcing phase incorporating strain hardening of the PFZ. The model is successfully applied to model the experimental data for the proof strengths of four Al Li Cu Mg type alloys and composites aged to obtain a wide range of microstructures and all strengthening contributions are quantified. It is shown that PFZ formation in the 8090 MMC causes a drastic reduction in the proof strength (about 100 MPa), but it has little influence on the time required for peak ageing. In all alloys strengthening due to GPB zones is more important than strengthening due to delta' (Al3Li) phase.
precipitation, strengthening, Al-Li-Cu-Mg, GPB, MMC, PFZ
3855-3868
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Gregson, P.J.
ddc3b65d-18fb-4c11-9fa1-feb7e9cbe9fe
19 October 1999
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Gregson, P.J.
ddc3b65d-18fb-4c11-9fa1-feb7e9cbe9fe
Starink, M.J., Wang, P., Sinclair, I. and Gregson, P.J.
(1999)
Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs: II. Modelling of yield strength.
Acta Materialia, 47 (14), .
(doi:10.1016/S1359-6454(99)00228-1).
Abstract
A detailed quantitative model for the strengthening of monolithic alloys and composites due to precipitation strengthening, solution strengthening, grain and subgrain strengthening, strengthening by dislocations and load transfer to ceramic inclusions is presented. The model includes a newly derived description of the effect of a precipitate free zone (PFZ) around the reinforcing phase incorporating strain hardening of the PFZ. The model is successfully applied to model the experimental data for the proof strengths of four Al Li Cu Mg type alloys and composites aged to obtain a wide range of microstructures and all strengthening contributions are quantified. It is shown that PFZ formation in the 8090 MMC causes a drastic reduction in the proof strength (about 100 MPa), but it has little influence on the time required for peak ageing. In all alloys strengthening due to GPB zones is more important than strengthening due to delta' (Al3Li) phase.
Text
8090StrngthB_vs5_hando.pdf
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Published date: 19 October 1999
Keywords:
precipitation, strengthening, Al-Li-Cu-Mg, GPB, MMC, PFZ
Identifiers
Local EPrints ID: 41412
URI: http://eprints.soton.ac.uk/id/eprint/41412
ISSN: 1359-6454
PURE UUID: 4edfd542-f0ce-49f0-9c0c-16bfbf982239
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Date deposited: 07 Sep 2006
Last modified: 15 Mar 2024 08:29
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Author:
P. Wang
Author:
P.J. Gregson
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