Talk by Prof. Rainer Birringer Universität des Saarlandes
ON THE MECHANISMS ENABLING PLASTICITY AT THE LOW END OF THE NANOSCALE
For plastic deformation to occur at grain sizes around or below 10 nm, one of the central issues that remains to be resolved is to identify the relative importance of the variety of different possible deformation modes and assign and quantify in which manner the relevant/dominant modes contribute with rising stress to overall strain. In a case study on NC PdAu alloy with grain sizes below 10 nm, we determined activation energy, shear activation volume and shear dilatation to identify and discriminate deformation mechanisms. In-situ deformation and diffraction is exploited to unravel the interplay of relevant mechanisms and their evolution as well as shares up to large plastic strains.
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