Abstract
Abstract The nanostructuring of materials is a process which enables their properties to be drastically changed as compared to their coarse crystalline condition. For example, peculiar features were achieved, e.g. extremely high yield and ultimate strengths. The structure of such nanoscale materials has not been characterized yet in detail as compared to materials of a coarser crystalline structure because an appropriate analytical technique did not exist. Nano beam diffraction (NBD) by transmission electron microscopy (TEM) makes possible a local resolution up to 1 nm and, thus, a diffraction analysis of individual nanograins. A recently developed method based on NBD allows determining crystallographic orientation relationships and analyzing the phases of individual nanograins. This article below sets forth the analytical possibilities of this method by way of a complete evidence of twin and small-angle grain boundaries in nanocrystalline copper and a phase identification of precipitates in an AlMg5Si2 alloy.
Published Version
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