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Superplastic Deformation of Al–Cu Alloys after Grain Refinement by Extrusion Combined with Reversible Torsion
| Content Provider | MDPI |
|---|---|
| Author | Rodak, Kinga Kuc, Dariusz Mikuszewski, Tomasz |
| Copyright Year | 2020 |
| Description | The binary as-cast Al–Cu alloys Al-5%Cu, Al-25%Cu, and Al-33%Cu (in wt %), composed of the intermetallic θ-Al2Cu and α-Al phases, were prepared from pure components and were subsequently severely plastically deformed by extrusion combined with reversible torsion (KoBo) to refinement of α-Al and Al2Cu phases. The extrusion combined with reversible torsion was carried out using extrusion coefficients of λ = 30 and λ = 98. KoBo applied to the Al–Cu alloys with different initial structures (differences in fraction and phase size) allowed us to obtain for alloys (Al-25%Cu and Al-33%Cu), with higher value of intermetallic phase, large elongations in the range of 830–1100% after tensile tests at the temperature of 400 °C with the strain rate of 10−4 s−1. The value of elongation depended on extrusion coefficient and increase, with λ increasing as a result of α-Al and Al2Cu phase refinement to about 200–400 nm. Deformation at the temperature of 300 °C, independently of the extrusion coefficient (λ), did not ensure superplastic properties of the analyzed alloys. A microstructural study showed that the mechanism of grain boundary sliding was responsible for superplastic deformation. |
| Starting Page | 5803 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma13245803 |
| Journal | Materials |
| Issue Number | 24 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-12-18 |
| Access Restriction | Open |
| Subject Keyword | Materials Manufacturing Engineering Kobo Extrusion Mechanical Properties Al–cu Alloys Microstructure and Superplastic Deformation |
| Content Type | Text |
| Resource Type | Article |
