Abstract:
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' low S grain 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 5 µm). 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.
Abstract:
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' low .SIGMA. grain 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 5 µm). 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.
Abstract:
Polycrystalline materials are prepared by electrodeposition of a precurso r 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 fracti on of 'special' low .SIGMA. grain boundaries and a randomized crystallograph ic texture. The precursor metallic material has sufficient purity and a fine -grained microstructure (e.g., an average grain size of 4 nm to 5 µm). The r esulting metallic material is suited to the fabrication of articles requirin g high mechanical or physical isotropy and/or resistance to grain boundary-m ediated deformation or degradation mechanisms.