Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 222, Issue -, Pages 373-380Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2015.03.029
Keywords
AA7xxx alloys; Residual stress; Precipitation; Gleeble machine; Neutron diffraction
Funding
- Competence Centre for Materials Science and Technology
- European Regional Development Fund (ERDF)
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In this paper, a simple but realistic approach is presented to predict the as-quenched residual stress distribution in thick 7xxx aluminium alloy plates. Instead of modelling precipitation that occurs during quenching, a thermo-mechanical model is used whose parameters are identified using a limited number of tensile tests achieved after representative interrupted cooling paths in a Gleeble machine. The material behaviour law accounts for recovery at high temperature in a simple way and neglects the Bauschinger effect as suggested by a dedicated experiment. The results of this simple approach are compared to residual stress measurements in plates of different thicknesses for two different 7xxx alloys, AA7449 and AA7040. (C) 2015 Elsevier B.V. All rights reserved.
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