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dc.contributor.author
Balog, Martin
dc.contributor.author
Hu, Tao
dc.contributor.author
Krizik, Peter
dc.contributor.author
Castro Riglos, Maria Victoria
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dc.contributor.author
Saller, Brandon D.
dc.contributor.author
Yang, Hanry
dc.contributor.author
Schoenung, Julie M.
dc.contributor.author
Lavernia, Enrique J.
dc.date.available
2018-06-27T01:04:39Z
dc.date.issued
2015-11
dc.identifier.citation
Balog, Martin; Hu, Tao; Krizik, Peter; Castro Riglos, Maria Victoria; Saller, Brandon D.; et al.; On the thermal stability of ultrafine-grained Al stabilized by in-situ amorphous Al2O3 network; Elsevier Science Sa; Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing; 648; 11-2015; 61-71
dc.identifier.issn
0921-5093
dc.identifier.uri
http://hdl.handle.net/11336/50248
dc.description.abstract
Bulk Al materials with average grain sizes of 0.47 and 2.4μm, were fabricated by quasi-isostatic forging consolidation of two types of Al powders with average particle sizes of 1.3 and 8.9μm, respectively. By utilizing the native amorphous Al2O3 (am-Al2O3) film on the Al powders surfaces, a continuous, ~7nm thick, am-Al2O3 network was formed in situ in the Al specimens. Systematic investigation of the changes to the am-Al2O3 network embedded in the Al matrix upon heating and annealing up to 600°C was performed by transmission electron microscopy (TEM). At the same time, the stability of the Al grain structure was studied by transmission Kikuchi diffraction (TKD), electron back-scatter diffraction (EBSD), and TEM. The am-Al2O3 network remained stable after annealing at 400°C for 24h. In-situ TEM studies revealed that at temperatures ≥450°C, phase transformation of the am-Al2O3 network to crystalline γ-Al2O3 particles occurred. After annealing at 600°C for 24h the transformation was completed, whereby only nanometric γ-Al2O3 particles with an average size of 28nm resided on the high angle grain boundaries of Al. Due to the pinning effect of γ-Al2O3, the Al grain and subgrain structures remained unchanged during annealing up to 600°C for 24h. The effect of the am-Al2O3→γ-Al2O3 transformation on the mechanical properties of ultrafine- and fine-grained Al is discussed from the standpoint of the underlying mechanisms.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Alumina (Al2o3)
dc.subject
Aluminum (Al)
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Metal Matrix Composite (Mmc)
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Powder Metallurgy (Pm)
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Thermal Stability
dc.subject
Ultrafine-Grained (Ufg) Materials
dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
On the thermal stability of ultrafine-grained Al stabilized by in-situ amorphous Al2O3 network
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-26T13:38:32Z
dc.journal.volume
648
dc.journal.pagination
61-71
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Balog, Martin. Slovak Academy of Sciences; Eslovaquia. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Hu, Tao. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Krizik, Peter. Slovak Academy of Sciences; Eslovaquia
dc.description.fil
Fil: Castro Riglos, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Saller, Brandon D.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Yang, Hanry. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Schoenung, Julie M.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Lavernia, Enrique J.. University of California at Davis; Estados Unidos
dc.journal.title
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.msea.2015.09.037
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0921509315303774
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