Optimization of Strength‐Electrical Conductivity Properties in Al–2Fe Alloy by Severe Plastic Deformation and Heat Treatment |
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| Authors: | Andrey E Medvedev Maxim Y Murashkin Nariman A Enikeev Ruslan Z Valiev Peter D Hodgson Rimma Lapovok |
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| Affiliation: | 1. Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, 3216, Australia;2. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, 450000, Russia;3. Laboratory for Mechanics of Bulk Nanostructured Materials, Saint Petersburg State University, Saint Petersburg, 198504, Russia |
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| Abstract: | High‐pressure torsion at room temperature followed by two processing routes, either 1) annealing at 200 °C for 8 h or 2) elevated temperature (200 °C) high‐pressure torsion, are employed to obtain simultaneous increase in mechanical strength and electrical conductivity of Al–2 wt%Fe. The comparative study of microstructure, particle distribution, mechanical properties, and electrical conductivity for both processing routes gives the optimal combination of high mechanical strength and high electrical conductivity in Al–2Fe alloy. It is shown that while the mechanical strength is approximately the same for both processing routes (>320 MPa), high‐pressure torsion at elevated temperature results in higher conductivity (≥52% IACS) due to reduction of Fe solute atom concentration in Al matrix compared to annealing treatment. High‐pressure torsion at 200 °C has been demonstrated as a new and effective way for obtaining combination of high mechanical strength and electrical conductivity in Al–Fe alloys. |
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| Keywords: | Al– Fe alloys Annealing Electrical conductivity High‐pressure torsion Hot deformation Mechanical strength |
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