Determination of geometrically necessary dislocations in large shear strain localization in aluminum

The influence of grain morphology on shear band propensity in 7039-Al alloy with shear zone aligned in the A-, B-, C-, and D-directions is identified by EBSD maps and geometrically-necessary analysis. Rows: 1st, A; 2nd, B; 3rd, C; 4th, D. Columns: 1st, EBSD image plotted with MTEX with selected example region showing the GND density map (Scale bar: 100 μm); 2nd, total GND density map of the selected region (log10 scale, unit: 1/cm2) with 20 μm scale bar; 3rd, GND density map of edge type dislocations (log10 scale, unit: 1/cm2) with 20 μm scale bar; 4th, GND density map of screw type dislocations (log10 scale, unit: 1/cm2) with 20 μm scale bar.272