Abstract
Cu/A5052 dissimilar metal laminates (DMLs) were fabricated by an accumulative roll bonding process. The Cu/A5052 DML consisted of hard and soft layers, in other words, high and low shear modulus layers, which is called a mille-feuille structure (MFS). The Cu/A5052 DML with the MFS showed kink deformation during monotonic compression. Kink formation was analyzed by in-situ optical microscopy and digital image correlation. The development behavior and morphology of the ortho-type kink depended on the annealing conditions prior to the compression tests. Based on the observations and measurements, criteria for kink formation in the DML with the MFS were proposed.
Fig. 4 Snapshot images, shear strain maps, and compressive strain maps of the ARB-processed Cu/A5052 composite during compression tests evaluated by DIC. The left column is for As-ARB, and the right column is for PA573. The nominal compressive strains of (a) and (g), (b) and (h), (c) and (i), (d) and (j), (e) and (k), and (f) and (l) are 0.04, 0.08, 0.12, 0.16, 0.20, and 0.24, respectively.
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