Characterization of Hot Deformation Behavior of Nanosized Al₂O₃ Reinforced Al6061 Composites
The hot deformation behavior of Al6061/Nano-Al₂O₃ composites were investigated at temperatures of 300 to 500 °C and strain rates of 0.001∼1/s using compression tests. The composite fabricated by the infiltration method consisted of an Al matrix and Al₂O₃ particles with a mean size of 200 nm. Interestingly, the true stress-true strain curves under all compressive conditions showed a peak stress at the initial stages of deformation, in which the peak stress increased with decreasing temperature and faster strain rate. The Z parameter, which is known as the temperature-compensated strain rate showed a linear relationship with the flow stress. The hot deformation mechanism is believed to occur through dynamic recrystallization, where fine equiaxed grains and dislocations were observed at the deformed specimens. A processing map was applied to evaluate the hot workability and flow instability region to determine the optimal deformation conditions of the composite.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2019 |
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Erschienen: |
2019 |
Enthalten in: |
Zur Gesamtaufnahme - volume:19 |
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Enthalten in: |
Journal of nanoscience and nanotechnology - 19(2019), 7 vom: 01. Juli, Seite 3929-3934 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Yeon, Kyu Ho [VerfasserIn] |
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Anmerkungen: |
Date Completed 02.06.2021 Date Revised 02.06.2021 published: Print Citation Status PubMed-not-MEDLINE |
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doi: |
10.1166/jnn.2019.16144 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM293904693 |
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520 | |a The hot deformation behavior of Al6061/Nano-Al₂O₃ composites were investigated at temperatures of 300 to 500 °C and strain rates of 0.001∼1/s using compression tests. The composite fabricated by the infiltration method consisted of an Al matrix and Al₂O₃ particles with a mean size of 200 nm. Interestingly, the true stress-true strain curves under all compressive conditions showed a peak stress at the initial stages of deformation, in which the peak stress increased with decreasing temperature and faster strain rate. The Z parameter, which is known as the temperature-compensated strain rate showed a linear relationship with the flow stress. The hot deformation mechanism is believed to occur through dynamic recrystallization, where fine equiaxed grains and dislocations were observed at the deformed specimens. A processing map was applied to evaluate the hot workability and flow instability region to determine the optimal deformation conditions of the composite | ||
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700 | 1 | |a Yu, Seung Baek |e verfasserin |4 aut | |
700 | 1 | |a Lee, Jeong Keun |e verfasserin |4 aut | |
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