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Microstructural evolution in a two-phase alloy processed by high-pressure torsion / Megumi Kawasaki in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 919-930 Titre : Microstructural evolution in a two-phase alloy processed by high-pressure torsion Type de document : texte imprimé Auteurs : Megumi Kawasaki, Auteur ; Byungmin Ahn, Auteur ; Terence G. Langdon, Auteur Article en page(s) : pp. 919-930 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Hardness  High-pressure  torsion  Homogeneity  Severe  plastic  deformation  Zinc–aluminum  alloys Index. décimale : 669 Métallurgie Résumé : Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Microstructural evolution in a two-phase alloy processed by high-pressure torsion [texte imprimé] / Megumi Kawasaki, Auteur ; Byungmin Ahn, Auteur ; Terence G. Langdon, Auteur . - pp. 919-930. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 919-930 Mots-clés : Hardness  High-pressure  torsion  Homogeneity  Severe  plastic  deformation  Zinc–aluminum  alloys Index. décimale : 669 Métallurgie Résumé : Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]

Microstructural evolution in a two-phase alloy processed by high-pressure torsion / Megumi Kawasaki in Acta materialia, Vol. 58 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 919–930 Titre : Microstructural evolution in a two-phase alloy processed by high-pressure torsion Type de document : texte imprimé Auteurs : Megumi Kawasaki, Auteur ; Byungmin Ahn, Auteur ; Terence G. Langdon, Auteur Année de publication : 2011 Article en page(s) : pp. 919–930 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Hardness  High-pressure  torsion  Homogeneity  Severe  plastic  deformation  Zinc–aluminum  alloys Résumé : Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006867 [article] Microstructural evolution in a two-phase alloy processed by high-pressure torsion [texte imprimé] / Megumi Kawasaki, Auteur ; Byungmin Ahn, Auteur ; Terence G. Langdon, Auteur . - 2011 . - pp. 919–930. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 3 (Fevrier 2010) . - pp. 919–930 Mots-clés : Hardness  High-pressure  torsion  Homogeneity  Severe  plastic  deformation  Zinc–aluminum  alloys Résumé : Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006867