Formation of Bulk Nanostructured Al3Ni from Elemental Micropowders Using High-Pressure Torsion

Ali Alhamidi; Kaveh Edalati; Zen Ji Horita

doi:10.4028/www.scientific.net/MSF.765.378

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A Review of Cooling Technologies for Flat Rolled Aluminium Products
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HomeMaterials Science ForumMaterials Science Forum Vol. 765Formation of Bulk Nanostructured Al3Ni from...

Formation of Bulk Nanostructured Al₃Ni from Elemental Micropowders Using High-Pressure Torsion

Abstract:

The formation of bulk nanograined Al₃Ni intermetallics from elemental micro-powder mixtures of Al-25 mol.% Ni are studied after processing by high-pressure torsion (HPT) for various turns at 473 K and at 573 K. It is found that nanograined Al₃Ni intermetallics with high angles of misorientation are produced at temperatures well below the melting temperature. The fraction of Al₃Ni intermetallics increases by increasing the shear strain and increasing the HPT processing temperature. During HPT, both Ni and Al atoms diffuse significantly in each other with a diffusion coefficient well comparable to the atomic interdiffusion in the Al₃Ni intermetallic at its melting temperature.

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Materials Science Forum (Volume 765)

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378-382

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.765.378

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Online since:

July 2013

Authors:

Ali Alhamidi, Kaveh Edalati, Zen Ji Horita

Keywords:

High-Pressure Torsion, Intermetallic, Severe Plastic Deformation (SPD), Ultrafine-Grained Microstructure

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