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High strength ultrafine/nanostructured aluminum produced by back pressure equal channel angular processing

journal contribution
posted on 2007-08-01, 00:00 authored by Wei XuWei Xu, T Honma, X Wu, S P Ringer, K Xia
High strength ultrafine/nanograined aluminum materials with ultimate strength up to 740 MPa and Vickers microhardness up to 2285 MPa were produced using back pressure equal channel angular processing of ultrafine-sized aluminum powder at 400 °C. Microstructure analyses revealed that the attained high strength and microhardness were derived from the presence of nanosized aluminum and γ -alumina grains (5-10 nm) as well as residual amorphous alumina. The interaction between the severe shear deformation and the preexisting amorphous alumina, concurrent oxidation, and amorphous to γ -alumina transition was considered to be responsible for the formation of such a refined and complex nanostructure.

History

Journal

Applied Physics Letters

Volume

91

Issue

3

Pagination

031901-1 - 031901-3

Publisher

A I P Publishing

Location

Melville, N.Y.

ISSN

0003-6951

Language

eng

Publication classification

CN.1 Other journal article

Copyright notice

2007, American Institute of Physics

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