Strength Enhancement in Thin-Layered Metal-Metal Laminates.

The results of the investigation reinforced the validity of the various theoretical concepts used to predict the strength enhancement in thin-layered metal-metal laminates. For the non-equal-layered Al-Cu laminates and the equal-layered Al-Cu and Al-Ag laminates, the measured ultimate yield-strengths were in good agreement with those calculated from the basic metal properties. This agreement provides confidence that the theoretical equations developed can be used to predict the strength properties of other metal pairs. In the case of the Mg-Cu laminates, a discrepancy existed between the experimental and calculated results. However, this discrepancy was probably caused by the incompleteness of the theoretical equations used in the computations, rather than by deficiencies in the basic theoretical concepts. As shown by the interfacial diffusion results, the laminates must have sharply defined interfaces for optimumstrength enhancement. Hence, any future manufacturing method must provide for minimal interfacial diffusion.