| Issue |
Manufacturing Rev.
Volume 2, 2015
|
|
|---|---|---|
| Article Number | 19 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/mfreview/2015022 | |
| Published online | 26 October 2015 | |
Research Article
Material modelling and its application to creep-age forming of aluminium alloy 7B04
1
Department of Mechanical Engineering, Imperial College London, London
SW7 2AZ, UK
2
AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing
100024, PR China
* e-mail: zhusheng.shi@imperial.ac.uk
Received:
14
September
2015
Accepted:
21
September
2015
Creep-ageing behaviour of aluminium alloy 7B04-T651 at 115 °C under a range of tensile stress levels has been experimentally investigated and numerically modelled for creep-age forming (CAF) applications. Creep strain, yield strength evolution and precipitate growth of creep-aged specimens were investigated. The alloy was modelled using a set of unified constitutive equations, which captures its creep deformation and takes into account yield strength contributions from three creep-age hardening mechanisms. Applications of the present work are demonstrated by implementing the determined material model into a commercial finite element analysis solver to analyse CAF operations carried out in a novel flexible CAF tool. Stress relaxation, yield strength, precipitate size and springback were predicted for the creep-age formed plates. The predicted springback were further quantified and compared with experimental measurements and a good agreement of 2.5% deviation was achieved. This material model now enables further investigations of 7B04 under various CAF scenarios to be conducted inexpensively via computational modelling.
Key words: Creep-age forming / Material modelling / Process modelling / Aluminium alloy 7B04
© A.C.L. Lam et al., Published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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