Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current
Round tensile test specimens of an age-hardened CuCr1Zr alloy were subjected to direct electrical current heating in a Gleeble thermal–mechanical simulator at 800 °C. The mechanical properties were monitored by the Vickers hardness test, and the changes in the grain structure were examined by light...
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MDPI AG
2021-07-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/7/1074 |
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| author | Miroslav Karlík Petr Haušild Philippe Pilvin Denis Carron |
| author_facet | Miroslav Karlík Petr Haušild Philippe Pilvin Denis Carron |
| author_sort | Miroslav Karlík |
| collection | DOAJ |
| description | Round tensile test specimens of an age-hardened CuCr1Zr alloy were subjected to direct electrical current heating in a Gleeble thermal–mechanical simulator at 800 °C. The mechanical properties were monitored by the Vickers hardness test, and the changes in the grain structure were examined by light metallography. A quantitative analysis of the size and distribution of fine precipitates during annealing was carried out using transmission electron microscopy (TEM). The grain structure showed a gradient corresponding to the gradient of the temperature on the test piece. Annealing for 60 s at 800 °C resulted in a partially (~50%) recrystallized structure with new grains about 45 μm in diameter. In the as-delivered condition, TEM documented tiny (1 to 4 nm) coherent chromium precipitates inducing strain fields in the matrix. During overaging, the particles lost their coherence and gradually coarsened up to a mean diameter of 40 nm after 300 s at 800 °C. The coarsening kinetics obeys Lifshitz, Sloyzov, and Wagner’s theory. |
| first_indexed | 2024-03-10T09:32:30Z |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T09:32:30Z |
| publishDate | 2021-07-01 |
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| spelling | doaj.art-81a5ffb76fcb4a4cac27bd7047f2c6fe2023-11-22T04:23:21ZengMDPI AGMetals2075-47012021-07-01117107410.3390/met11071074Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric CurrentMiroslav Karlík0Petr Haušild1Philippe Pilvin2Denis Carron3Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech RepublicDepartment of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech RepublicUMR CNRS 6027, IRDL, Centre de Recherche C. Huygens, Université Bretagne Sud, Rue de Saint-Maudé, 56321 Lorient, FranceUMR CNRS 6027, IRDL, Centre de Recherche C. Huygens, Université Bretagne Sud, Rue de Saint-Maudé, 56321 Lorient, FranceRound tensile test specimens of an age-hardened CuCr1Zr alloy were subjected to direct electrical current heating in a Gleeble thermal–mechanical simulator at 800 °C. The mechanical properties were monitored by the Vickers hardness test, and the changes in the grain structure were examined by light metallography. A quantitative analysis of the size and distribution of fine precipitates during annealing was carried out using transmission electron microscopy (TEM). The grain structure showed a gradient corresponding to the gradient of the temperature on the test piece. Annealing for 60 s at 800 °C resulted in a partially (~50%) recrystallized structure with new grains about 45 μm in diameter. In the as-delivered condition, TEM documented tiny (1 to 4 nm) coherent chromium precipitates inducing strain fields in the matrix. During overaging, the particles lost their coherence and gradually coarsened up to a mean diameter of 40 nm after 300 s at 800 °C. The coarsening kinetics obeys Lifshitz, Sloyzov, and Wagner’s theory.https://www.mdpi.com/2075-4701/11/7/1074CuCr1Zr alloyrecrystallizationprecipitationelectron microscopymechanical properties |
| spellingShingle | Miroslav Karlík Petr Haušild Philippe Pilvin Denis Carron Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current Metals CuCr1Zr alloy recrystallization precipitation electron microscopy mechanical properties |
| title | Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current |
| title_full | Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current |
| title_fullStr | Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current |
| title_full_unstemmed | Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current |
| title_short | Evolution of the Microstructure of a CuCr1Zr Alloy during Direct Heating by Electric Current |
| title_sort | evolution of the microstructure of a cucr1zr alloy during direct heating by electric current |
| topic | CuCr1Zr alloy recrystallization precipitation electron microscopy mechanical properties |
| url | https://www.mdpi.com/2075-4701/11/7/1074 |
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