Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering
Nanocrystalline 6061 Al alloy was synthesized by cryogenic milling (cryomilling). Both transmission electron microscopy and X-ray diffraction were used to monitor the change in grain size as a function of milling time. The results of both techniques demonstrated a close agreement with respec...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/921017 |
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| author | Walid Hanna Khinlay Maung Ehab A. El-Danaf Abdulhakim A. Almajid Mahmoud S. Soliman Farghalli A. Mohamed |
| author_facet | Walid Hanna Khinlay Maung Ehab A. El-Danaf Abdulhakim A. Almajid Mahmoud S. Soliman Farghalli A. Mohamed |
| author_sort | Walid Hanna |
| collection | DOAJ |
| description | Nanocrystalline 6061 Al alloy was synthesized by cryogenic milling (cryomilling).
Both transmission electron microscopy and X-ray diffraction were used to monitor the change in grain size as a function of milling time.
The results of both techniques demonstrated a close agreement with respect to two observations:
(a) during cryomilling, the grain size of 6061 Al decreased with milling time, and (b) after 15 h of milling,
the grain size approached a minimum value of about 22 nm. Despite this agreement, there was a discrepancy: for grain sizes > 40 nm, the grain size measured by transmission electron microscopy was appreciably larger than that inferred from X-ray diffraction. It was shown that powders consolidated via high frequency
induction heat sintering (HFIHS) at 500 and 550°C maintained close to nanoscale grain sized microstructure in addition to high compact density in bulk samples.
This was manifested by high strength values as compared to microscale grain samples. |
| format | Article |
| id | doaj-art-a622cd529abe412fad516d16e91a0641 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-a622cd529abe412fad516d16e91a06412025-08-20T03:38:47ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/921017921017Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat SinteringWalid Hanna0Khinlay Maung1Ehab A. El-Danaf2Abdulhakim A. Almajid3Mahmoud S. Soliman4Farghalli A. Mohamed5Materials Science, Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA 92697, USAMaterials Science, Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA 92697, USAMechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaMechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaMechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaMaterials Science, Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA 92697, USANanocrystalline 6061 Al alloy was synthesized by cryogenic milling (cryomilling). Both transmission electron microscopy and X-ray diffraction were used to monitor the change in grain size as a function of milling time. The results of both techniques demonstrated a close agreement with respect to two observations: (a) during cryomilling, the grain size of 6061 Al decreased with milling time, and (b) after 15 h of milling, the grain size approached a minimum value of about 22 nm. Despite this agreement, there was a discrepancy: for grain sizes > 40 nm, the grain size measured by transmission electron microscopy was appreciably larger than that inferred from X-ray diffraction. It was shown that powders consolidated via high frequency induction heat sintering (HFIHS) at 500 and 550°C maintained close to nanoscale grain sized microstructure in addition to high compact density in bulk samples. This was manifested by high strength values as compared to microscale grain samples.http://dx.doi.org/10.1155/2014/921017 |
| spellingShingle | Walid Hanna Khinlay Maung Ehab A. El-Danaf Abdulhakim A. Almajid Mahmoud S. Soliman Farghalli A. Mohamed Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering Advances in Materials Science and Engineering |
| title | Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering |
| title_full | Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering |
| title_fullStr | Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering |
| title_full_unstemmed | Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering |
| title_short | Nanocrystalline 6061 Al Powder Fabricated by Cryogenic Milling and Consolidated via High Frequency Induction Heat Sintering |
| title_sort | nanocrystalline 6061 al powder fabricated by cryogenic milling and consolidated via high frequency induction heat sintering |
| url | http://dx.doi.org/10.1155/2014/921017 |
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