Method for Preparing Polycrystalline Structures Having Improved Mechanical and Physical Properties

摘要

Polycrystalline materials are prepared by electrodeposition of a precursor material that is subsequently heat-treated to induce at least a threefold increase in the grain size of the material to yield a relatively high fraction of‘special’lowΣgrain boundaries and a randomized crystallographic texture. The precursor metallic material has sufficient purity and a fine-grained microstructure (e.g., an average grain size of 4 nm to 5μm). The resulting metallic material is suited to the fabrication of articles requiring high mechanical or physical isotropy and/or resistance to grain boundary-mediated deformation or degradation mechanisms.