Material modelling and its application to creep-age forming of aluminium alloy 7B04
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Author(s)
Type
Journal Article
Abstract
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.
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.
Date Issued
2015-10-26
Date Acceptance
2015-09-21
Citation
Manufacturing Review, 2015, 2
ISSN
2265-4224
Publisher
EDP Sciences
Journal / Book Title
Manufacturing Review
Volume
2
Copyright Statement
© 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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Sponsor
Beijing Aeronautical Manufacturing Technology Research Institute
First Aircraft Institute
Grant Number
N/A
N/A
Publication Status
Published
Article Number
19