Effect of Milling Time on Consolidation of Al5083 Nanocomposite by Equal Channel Angular Pressing

K. Chandra Sekhar; Y. Umamaeshwar Rao; Balasubramanian Ravisankar; S. Kumaran

doi:10.4028/www.scientific.net/MSF.969.662

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HomeMaterials Science ForumMaterials Science Forum Vol. 969Effect of Milling Time on Consolidation of Al5083...

Effect of Milling Time on Consolidation of Al5083 Nanocomposite by Equal Channel Angular Pressing

Abstract:

The effect of milling time on consolidation of Al5083-5wt. % nanoyttrium oxide powders which are milled from 0-35 hours using planetary ball mill. nanocrystalline structure was observed after 10hours of milling. X-ray diffraction results reveals the formation of 57nm and 31nm for 20hr and 35hr of milling with increase in lattice strain. Circular and Elliptical morphology of milled powders were confirmed through SEM with decrease in particle size. The 90^o die channel angle ECAP die was used to consolidate 20hr and 35hr milled powder aided with and without back pressure. The optical micrographs reveal the formation of fine grains. The35hr milled powder shows the maximum densification of 96% and 20hr milled powder shows maximum hardness of 82HRB was observed in 20hr milled powder. Both are consolidated for two passes in route-A and sintered at 430°C for one hour.

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Periodical:

Materials Science Forum (Volume 969)

Pages:

662-668

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.969.662

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Online since:

August 2019

Authors:

K. Chandra Sekhar*, Y. Umamaeshwar Rao, Balasubramanian Ravisankar, S. Kumaran

Keywords:

Al-5083 Nanocomposite, Characterisation, ECAP, Mechanical Alloying

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