Abstract
Aluminum alloys have been increasingly used in the automotive industry for fuel economy. The existence of second phase particles in aluminum alloys provides damage nucleation sites during formation processes and limits the formability. Characterization of second phase particle distribution and its effect on the formability of aluminum alloys is of great importance. Distribution of Feand Mn-based second phase particles in Al-Mg alloys AA5182 and AA5754 is captured using microscopy and image analysis. Spatial tessellation of particle images is conducted to quantify particle distribution, such as particle size, shape (aspect ratio) and clustering. Large particles are found more often in AA5182 than AA5754. The obtained particle distribution is then applied to a so-called damage percolation model to predict formability of both alloys in stretch flanging.
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