Effect of temperature and frequency of dynamic loading in the viscoelastic properties of aluminium alloy 7075-T6
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hdl:2117/14607
Tipus de documentArticle
Data publicació2011-06-24
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Abstract
The viscoelastic response of a material offers an alternative
method for analyzing its microstructure, phase transformations
and fatigue behaviour. In this work, the viscoelastic
properties of commercial aluminium alloy (AA)
7075-T6 are studied with a Dynamic-Mechanical Analyzer
(DMA), and results are combined with Transmission
Electron Microscopy (TEM) and Differential Scanning
Calorimetry (DSC) data. In accordance with this
analysis, we propose an analytical model for the storage
modulus E’ as a function of temperature, frequency of
the dynamic loading and the concentration of Guinier-
Preston Zones (GPZ). The latter parameter is obtained as
a function of temperature after integration and fitting of
the model. It is shown that the proposed model fits the
experimental data for the storage modulus reasonably
well in the prescribed region, and that this fact supports
the hypothesis that the change in the storage modulus
slope at about 130-160 ºC is due to GPZ decomposition
CitacióRojas, J.; Aguiar, A.; Crespo, D. Effect of temperature and frequency of dynamic loading in the viscoelastic properties of aluminium alloy 7075-T6. "Physica status solidi C. Current topics in solid state physics", 24 Juny 2011, vol. 8, núm. 11-12, p. 3111-3114.
ISSN1862-6351
Versió de l'editorhttp://onlinelibrary.wiley.com/doi/10.1002/pssc.201000732/abstract
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