Abstract
Magnesium alloys have great potential for lightweighting applications in the transportation industry. It is known, however, that Mg and Mg-alloys exhibit large plastic strain heterogeneity. Such heterogeneity is important both from the perspective of formability and fracture if such sheet materials are to be stamped. Also, such observations are important for our fundamental understanding of how plasticity spreads in such materials. In this work we have sought to couple together local plastic strain measurements using digital image correlation with full-field crystal plasticity simulations with the idea of identifying and quantifying the plastic strain heterogeneity. A recently developed ZEK-100 alloy has been studied, as this alloy has shown promise as a wrought sheet product.
Highlights
E-beam lithorgraphy (Fig. 1) has been used to generate a regular grid on the surface of a ZEK-100 tensile specimen cut from a thermomechanically processed sheet material having a fully recrystallized microstructure and an average grain size of ∼30 μm (see (Martin, 2013), (Martin, 2012) for a more detailed description of the e-beam lithorgraphy and image correlation technique)
Prior to mechanical testing EBSD was performed on the area containing the lithographically developed grid (Fig. 2)
The microstructure is seen to be well recrystallized and the texture is that typically of the ZEK alloys, i.e. a weak split basal texture with intensity spread along the transverse direction of the sheet
Summary
E-beam lithorgraphy (Fig. 1) has been used to generate a regular grid on the surface of a ZEK-100 tensile specimen cut from a thermomechanically processed sheet material having a fully recrystallized microstructure and an average grain size of ∼30 μm (see (Martin, 2013), (Martin, 2012) for a more detailed description of the e-beam lithorgraphy and image correlation technique). Prior to mechanical testing EBSD was performed on the area containing the lithographically developed grid (Fig. 2).
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