Densification of Mechanically Alloyed Al5083-5wt% Y2O3 Nano Composite by Equal Channel Angular Pressing

Pravir Polly; K. Chandra Sekhar; Balasubramanian Ravisankar; S. Kumaran

doi:10.4028/www.scientific.net/AMM.592-594.963

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 592-594Densification of Mechanically Alloyed Al5083-5wt%...

Densification of Mechanically Alloyed Al5083-5wt% Y₂O₃ Nano Composite by Equal Channel Angular Pressing

Abstract:

In the present work, Al-5083-5wt% nanoyttria powders were milled for 10, 20, 30 and 35 hrs in a high energy ball milling under optimised process parameters. The milled powders were characterised by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Milled powders exhibit nanocrystalline single phase after 10hrs of milling. Consolidation of 35 hrs milled powder was done by equal channel angular pressing (ECAP) through 90^o die channel angle using route A upto three passes with and without back pressure and sintered under controlled environment. Density of ECAPed samples was measured using Archimedes principle. The density is 96% for the sample consolidated with backpressure after two passes after sintering.

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Periodical:

Applied Mechanics and Materials (Volumes 592-594)

Pages:

963-967

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.592-594.963

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Online since:

July 2014

Authors:

Pravir Polly, K. Chandra Sekhar, Balasubramanian Ravisankar*, S. Kumaran

Keywords:

Al-5083 Composite, ECAP, Mechanical Alloying, Nanocrystalline

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