Bestimmung lokaler Textur- und Spannungsverteilungen an submikro-/nanokristallinen mehrphasigen Gradientenmaterialien mittels zweidimensionaler Röntgenmikrobeugung sowie an-hand analytischer und numerischer Modellierungsansätze (English shop)

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Advanced engineering applications place high demands on novel materials, both with regard to, e.g., mechanical properties such as strength and ductility and with regard to the widest possible range of applicability (tailoring, etc.). In addition, conservation of resources and sustainable production must be achieved while maintaining high performance. Accordingly, there is a need for fundamental research on innovative materials (e.g. composite materials) and their processing.

In the present dissertation, submicro-/nanocrystalline multiphase gradient materials are investigated with respect to specific properties and their correlation with the manufacturing process (severe plastic deformation by accumulative swaging), on the one hand by means of experimental methods such as two-dimensional X-ray microdiffraction (in a suitably further developed form) and on the other hand by means of analytical and numerical model calculations. In particular, local distributions of crystallographic texture as well as of mechanical (residual) stresses are analysed and interpreted and correlated with regard to material-relevant properties (e.g. mechanical, microstructural). Such relationships are of technical relevance with respect to prospective applications, e.g. in the field of high-strength lightweight design solutions.