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AuthorEl Mehtedi, M.
AuthorMusharavati, F.
AuthorSpigarelli, S.
Available date2016-10-02T09:33:45Z
Publication Date2014-02
Publication NameMaterials & Design (1980-2015)en_US
Identifierhttp://dx.doi.org/10.1016/j.matdes.2013.09.013
CitationM. El Mehtedi, F. Musharavati, S. Spigarelli, Modelling of the flow behaviour of wrought aluminium alloys at elevated temperatures by a new constitutive equation, Materials & Design (1980-2015), Volume 54, February 2014, Pages 869-873
ISSN02613069
URIhttp://www.sciencedirect.com/science/article/pii/S0261306913008650
URIhttp://hdl.handle.net/10576/4803
AbstractThe hot working behaviour of an Al–0.7%Mg–0.4%Si (wt.%) aluminium alloy has been investigated by torsion testing in the 450–575°C temperature range. The behaviour of the alloy, in terms of equivalent stress vs equivalent strain, was modelled by a modified form of the Hensel and Spittel constitutive equation. In this new equation, the applied stress σ was replaced by the sinh(ασ) term, where α was a constant. The revised form of the Hensel–Spittel equation gave an excellent description of the flow curves and of the decrease in the strain rate sensitivity of the flow stress observed, at a given strain, with increasing strain rate. The model equation was then rewritten to explicitly include the Arrhenius term describing the temperature dependence of strain rate. The calculation indicated that the activation energy for hot working decreased from 218 to 198kJmol−1 in the considered range of strain.
Languageen
PublisherElsevier, Ltd
SubjectHot working
SubjectConstitutive equations
SubjectMechanical characterization
SubjectAluminium alloys
TitleModelling of the flow behaviour of wrought aluminium alloys at elevated temperatures by a new constitutive equation
TypeArticle
Pagination869-873
Volume Number54


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