Abstract
The use of stamped aluminium alloy components in the automotive industry is commonplace nowadays. To design these components correctly, it is necessary to know how the mechanical properties of sheet metals change when the material is deformed, generally under biaxial strain. In this paper, the influence of the pre-deformation on yield strength in an aluminium alloy 5000 series is studied from a new methodology that combines the Marciniak stretching test (levels of biaxial strain) and the Small Punch Test. New expressions to estimate yield strength using the Small Punch Test in biaxial pre-deformed material have been developed.
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