The recent development of bulk metallic glasses (BMGs) has attracted enormous interest because of their positive combination of high thermal stability against crystallization with remarkable mechanical properties at room temperature. However, the plastic deformation at room temperature of these materials is generally inhomogeneous and occurs via highly localized shear bands, which finally leads to catastrophic failure. Recently, it has been reported that mechanical pretreatment of metallic glasses, such as cold rolling or the application of an elastostatic stress, may change the mechanical properties of the glass leading to considerable room temperature ductility. These findings suggest that highly deformable metallic glasses may be produced from brittle glassy precursors by simply applying plastic or elastic deformation. The aim of this work is to explore the possibility to ductilize brittle metallic glasses by systematically investigating the effect of mechanical deformation on structure and mechanical properties of different types of glassy materials and to fully evaluate the effectiveness of this approach as a universal ductilization process. In order to achieve this purpose it is essential to understand the fundamental mechanism responsible for the enhanced ductility. To reach this goal, detailed investigations of the structural and thermal properties of the as-cast and the mechanically pretreated materials have been performed to correlate any structural change with the observed changes in the mechanical properties and, finally, to find a model description for their mechanical properties.

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1. Corrosion Behaviour of Iron-based Bulk Metallic Glasses