Experimental Characterization and Modelling of the PLC Effect in an AlMg-Alloy
Peer reviewed, Journal article
Accepted version
Åpne
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https://hdl.handle.net/11250/2722473Utgivelsesdato
2021Metadata
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Originalversjon
Materials Science Forum. 2021, 1016 188-193. 10.4028/www.scientific.net/MSF.1016.188Sammendrag
In the present work, uniaxial tension tests have been conducted to study the mechanical response of a commercial Al4.5wt%Mg alloy (AA5182). The measurements range from the strain rate of 10-4 to 100 s-1 at room temperature. Digital image correlation (DIC) is also utilized to characterize the heterogeneous deformation of PLC localization. An extremely high camera frame rate (1000Hz) is applied to accurately measure the critical strain of instabilities, especially for tests at high strain rates (>10-1 s-1). The objective of this work has been to evaluate currently existing constitutive and physically based models to see to which extent they can match the experimental findings related to dynamic strain aging, i.e. stress-strain curves, work hardening behavior and critical strain behavior.
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