Mechanical Properties,Fatigue Life,and Electrical Conductivity of Cu–Cr–Hf Alloy after Equal Channel Angular Pressing |
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| Authors: | Daria V. Shangina Vladimir F. Terent'ev Dmitry V. Prosvirnin Olga V. Antonova Natalia R. Bochvar Mikhail V. Gorshenkov Georgy I. Raab Sergey V. Dobatkin |
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| Affiliation: | 1. Russian Academy of Sciences, A.A. Baikov Institute of Metallurgy and Materials Science, Moscow, Leninskiy prospect 49, 119334, Russia;2. Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology “MISIS”, Moscow, Leninskiy prospect 4, 119049, Russia;3. Department of Physical Materials Science, National University of Science and Technology “MISIS”, Moscow, Leninskiy prospect 4, 119049, Russia;4. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, K. Marx Street 12, 450000, Russia |
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| Abstract: | Structure, mechanical, and service properties of a Cu–Cr–Hf alloy after quenching, equal‐channel angular pressing (ECAP), and subsequent aging have been studied. The positive effects of ultrafine‐grained structure formation (grain/subgrain size of ≈200 nm) during ECAP and strengthening particles precipitation upon subsequent aging at 450 °C on the mechanical and fatigue properties of the alloy are shown. Ultrafine‐grained Cu–Cr–Hf alloy after aging shows increasing in the fatigue limit on the basis of 107 cycles from 185 to 375 MPa relative to that of the initial coarse‐grained state. The alloy after ECAP and aging also exhibits sufficient elongation to failure (11.4%) and good electrical conductivity (78%IACS). |
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| Keywords: | copper alloy equal channel angular pressing ultrafine‐grained structure electrical conductivity fatigue |
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