Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys
High-pressure torsion has been used to obtain the ultra-fine grained (UFG) state with a high specific area of grain boundaries (GBs) in Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni solid solutions with face-centered cubic (fcc) lattices. The UFG samples were heated in a differential scanning calorimeter (D...
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| Format: | Article |
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MDPI AG
2018-12-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/9/1/10 |
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| author | Olga Kogtenkova Boris Straumal Anna Korneva Tomasz Czeppe Anna Wierzbicka-Miernik Marek Faryna Pawel Zięba |
| author_facet | Olga Kogtenkova Boris Straumal Anna Korneva Tomasz Czeppe Anna Wierzbicka-Miernik Marek Faryna Pawel Zięba |
| author_sort | Olga Kogtenkova |
| collection | DOAJ |
| description | High-pressure torsion has been used to obtain the ultra-fine grained (UFG) state with a high specific area of grain boundaries (GBs) in Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni solid solutions with face-centered cubic (fcc) lattices. The UFG samples were heated in a differential scanning calorimeter (DSC). Small endothermic peaks in the DSC curves were observed in the one-phase solid-solution area of the respective phase diagrams, i.e., far away from the bulk solidus and solvus lines. A possible explanation of these endothermic peaks is based on the hypothesis of phase transformations between GB complexions. This hypothesis has been supported by observations with transmission electron microscopy and electron backscattering diffraction. The new lines of GB phase transformations have been constructed in the Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni bulk phase diagrams. |
| first_indexed | 2024-12-21T13:18:24Z |
| format | Article |
| id | doaj.art-bfb0c3f999184f74aa66658606f75cc1 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-21T13:18:24Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-bfb0c3f999184f74aa66658606f75cc12022-12-21T19:02:39ZengMDPI AGMetals2075-47012018-12-01911010.3390/met9010010met9010010Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based AlloysOlga Kogtenkova0Boris Straumal1Anna Korneva2Tomasz Czeppe3Anna Wierzbicka-Miernik4Marek Faryna5Pawel Zięba6Institute of Solid State Physics, Russian Academy of Sciences, Ac. Ossipyan str. 2, 142432 Chernogolovka, RussiaInstitute of Solid State Physics, Russian Academy of Sciences, Ac. Ossipyan str. 2, 142432 Chernogolovka, RussiaInstitute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059 Krakow, PolandInstitute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059 Krakow, PolandInstitute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059 Krakow, PolandInstitute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059 Krakow, PolandInstitute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059 Krakow, PolandHigh-pressure torsion has been used to obtain the ultra-fine grained (UFG) state with a high specific area of grain boundaries (GBs) in Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni solid solutions with face-centered cubic (fcc) lattices. The UFG samples were heated in a differential scanning calorimeter (DSC). Small endothermic peaks in the DSC curves were observed in the one-phase solid-solution area of the respective phase diagrams, i.e., far away from the bulk solidus and solvus lines. A possible explanation of these endothermic peaks is based on the hypothesis of phase transformations between GB complexions. This hypothesis has been supported by observations with transmission electron microscopy and electron backscattering diffraction. The new lines of GB phase transformations have been constructed in the Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni bulk phase diagrams.http://www.mdpi.com/2075-4701/9/1/10grain boundarieshigh-pressure torsiondifferential scanning calorimeterphase transformationmetastable phasesAl-ZnAl-MgCu-AgCu-CoCu-Ni |
| spellingShingle | Olga Kogtenkova Boris Straumal Anna Korneva Tomasz Czeppe Anna Wierzbicka-Miernik Marek Faryna Pawel Zięba Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys Metals grain boundaries high-pressure torsion differential scanning calorimeter phase transformation metastable phases Al-Zn Al-Mg Cu-Ag Cu-Co Cu-Ni |
| title | Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys |
| title_full | Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys |
| title_fullStr | Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys |
| title_full_unstemmed | Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys |
| title_short | Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys |
| title_sort | grain boundary complexions and phase transformations in al and cu based alloys |
| topic | grain boundaries high-pressure torsion differential scanning calorimeter phase transformation metastable phases Al-Zn Al-Mg Cu-Ag Cu-Co Cu-Ni |
| url | http://www.mdpi.com/2075-4701/9/1/10 |
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