Influence of combined deformation on the microstructure and microhardness of aluminum
The article presents the results of studying the effect of combined deformation, including mechanical activation and subsequent consolidation by torsion under pressure, on the microstructure and microhardness of aluminum. In the section perpendicular to the anvil plane, the formation of an anisotropic state in the form of a submicrocrystalline band structure fragmented into subgrains is observed. Two types of highly defective state were revealed: submicrocrystalline grains with a crystal lattice curvature of up to several tens of degrees/μm and nanocrystalline grains with nanosized twins. Thus, after the combined deformation, the structural state of aluminum is a complex structural composite. It was established that a significant increase in the microhardness values in the central and peripheral parts of the disk sample after consolidation is provided by the formation of a highly defective state in the aluminum powder precursor at the stage of mechanical activation.
Keywords
aluminum,
mechanical activation,
torsion under pressure,
microstructure,
microhardnessAuthors
| Grinyaev Konstantin V. | Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences | kvgrinyaev@ispms.tsc.ru |
| Ditenberg Ivan A. | Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences | ditenbergia@ispms.tsc.ru |
Всего: 2
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