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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 9/2020

08.09.2020

Micro/Meso-Scale Equal Channel Angular Pressing of Al 1070 Alloy: Microstructure and Mechanical Properties

verfasst von: Walaa Abdel-Aziem, Atef Hamada, Takehiko Makino, Mohsen A. Hassan

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 9/2020

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Abstract

In the present study, Al 1070 alloy pins were processed via micro/meso-scale equal channel angular pressing (channel diameter 1.5 mm, the smallest channel diameter has ever been achieved in mesoscale), up to four passes at room temperature. The microstructure characteristics, i.e., grain size, and misorientation angle distributions were analyzed by high-resolution electron backscatter diffraction on the transverse plane for the ECAPed samples. Tensile properties for such small processed pins were measured by constructed micro/meso-scale tensile machine. The gauge length and the gauge diameter were 2 mm and 1.5 mm, respectively. After the fourth ECAP pass, the results revealed that the microstructure was refined remarkably from 15.5 μm (the initial undeformed sample) to nearly 1.9 μm due to the gradual transformation of the low-angle grain boundaries into high-angle grain boundaries as a result of the occurrence of grain subdivision. Micro/meso-scale ECAP does a significant enhancement in the ultimate tensile strength by 63%, whereas the ductility decreased after the fourth ECAP pass by 47.3% and this is supposed to be ascribed to the continuous decrease in subgrain size. The above results prove that the ECAP process has the potential for obtaining fine grains and improving material tensile properties even in micro/meso-scale.
Vorheriger Artikel Shape-Controlled Catalytic ZIF-67 Micromotors for Dye Adsorption
Nächster Artikel Multivariable Analysis of Electrodeposited Silane/Zinc Coating—Improvement of Cathodic Protection of Steel

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Metadaten
Titel
Micro/Meso-Scale Equal Channel Angular Pressing of Al 1070 Alloy: Microstructure and Mechanical Properties
verfasst von
Walaa Abdel-Aziem
Atef Hamada
Takehiko Makino
Mohsen A. Hassan
Publikationsdatum
08.09.2020
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 9/2020
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-020-05090-4

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