An investigation on shear banding and crystallographic texture of Ag–Cu alloys deformed by high-pressure torsion
| Autor: | K.S. Kormout, U. Lienert, Pradipta Ghosh, Reinhard Pippan, Jozef Keckes, Juraj Todt |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Torsion (mechanics) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Nanocrystalline material High pressure 0103 physical sciences X-ray crystallography ddc:620 Severe plastic deformation Composite material 0210 nano-technology Shear band Powder mixture Eutectic system |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers / C 233(3), 794-806 (2018). doi:10.1177/0954406218761508 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1177/0954406218761508 |
| Popis: | Ag–Cu alloys of two different initial microstructures—a cast eutectic alloy (AgCu-E) and an equivolume Ag–Cu powder mixture (AgCu-P)—were deformed by high-pressure torsion. The codeformation of Ag and Cu grains led to uniform refinement and a nanolamellar microstructure for both alloys. However, the lamellar structure in AgCu-P alloys was broken at intermediate shear strains (γ > 150) by extensive shear banding. On the other hand, no shear banding was observed for AgCu-E alloy at similar microstructural refinement. At higher strains deformation induced intermixing of Ag and Cu atoms was observed. Further, three-dimensional diffraction analysis of AgCu-E alloy showed that in contrast to conventional single phase alloys, the Ag and Cu phases develop similar crystallographic texture. |
| Databáze: | OpenAIRE |
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