Deformation-induced alloying and reactions in nanostructured multilayers

Abstract

Deformation-induced alloying reactions in multilayers depend on the refinement of the layer structure and the atomic-scale mixing at the interfaces. Under intense deformation of multilayer samples, a nanometer-scale layer thickness and grain size develops during repeated cold rolling. As the length scale of the layer thickness converges to that of the interfacial mixing zone during rolling, alloying and amorphization can develop in appreciable volumes. The relative specific interfacial area is then a key metric to describe deformation-driven alloying. The examination of amorphous Al alloys suggests that the deformation-induced crystallization reactions could be linked to quenched-in atomic arrangements that are also evident from structural studies. Deformation-induced devitrification reactions depend on the formation of shear bands and therefore implicitly on the process conditions.