Ultrafine-grained laminated metal composites – a new promising class of materials for lightweight applicationsThursday (09.11.2017) 09:55 - 10:15 Part of:
Laminated metal composites (LMCs) are a unique class of hybrid materials in which alternating metallic layers are bonded together with discrete interfaces. The accumulative roll bonding process enables the production of thin-layered laminated metal composites. Moreover, it is possible to generate an ultrafine-grained microstructure during this process. For an optimization of these new structures a fundamental understanding of the interactions and deformation processes at the internal interfaces is necessary. In this talk, special attention is paid to aluminum/steel and aluminum/titan composites as the positives aspects of the two constituent materials can be combined. The LMCs were tested by static- and dynamic experiments in tensile and three-point bending test. The influence of the meso- and microstructure on the deformation behavior was intensively studied by scanning electron microscope. In order to clarify effect of the layer architecture on the internal stress distribution, finite element simulation were performed. By a smart layer architecture, the monotonic and fatigue strength of ultrafine-grained LMCs can be drastically increased.