Effect of Manufacturing Processes and Welding Type on Quasi-static and Dynamic Responses of Aluminum Alloys: Experiments and Modeling

Measured responses of two aluminum alloys over a wide range of strain-rates (10−5 to 103 s−1) and temperatures are presented. The aluminum alloys include AA5182-O and AL6111-T4. A tensile spilt Hopkinson pressure bar was used for the dynamic experiments. The aluminum AA5182-O alloy (manufactured using continuous casting and direct chilling processes) including its first and second generation gas tungsten arc welded and friction stir welded TWB’s exhibited negative strain-rate sensitivity. AL6111-T4 is found to have positive strain-rate sensitivity. The Khan-Huang-Liang constitutive model is shown to correlate and predict the observed responses reasonably well. The texture evolution of the AA5182-O and AL6111-T4 sheets during uniaxial tension is investigated using the EBSD technique and full-constraint polycrystal model. It is observed through the EBSD analysis that, the stable orientation is strongly dependent on the initial texture components. © 2015, Society for Experimental Mechanics, Inc.