Novel Grain Boundary Solute Architecture in a Nanostructured Ultra-High Strength 7075 Aluminium Alloy

Abstract:

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In recent years, the pursuit of higher strength metals and alloys has led researchers to nanometer scale grain refinement. New nanocrystalline engineering techniques have successfully increased properties for a wide range of materials. Here we report a nanocrystalline 7075 alloy processed by high-pressure torsion that exhibits ultra-high strength and features a hierarchical solute architecture. The new hierarchy of solute architecture was discovered through high-resolution characterisation using novel techniques we have developed in atom probe tomography. These new techniques – nanotexture and fine scale solute cluster measurements, are the focus of this paper. Our results indicate that nanometer-scale engineering of solid solutions could offer a pathway towards a new generation of super-strong alloys that hold promise for creating entirely new regimes of property-performance space.

Info:

Periodical:

Materials Science Forum (Volumes 618-619)

Edited by:

M.S. Dargusch & S.M. Keay

Pages:

543-546

DOI:

10.4028/www.scientific.net/MSF.618-619.543

Citation:

P. V. Liddicoat et al., "Novel Grain Boundary Solute Architecture in a Nanostructured Ultra-High Strength 7075 Aluminium Alloy", Materials Science Forum, Vols. 618-619, pp. 543-546, 2009

Online since:

April 2009

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Price:

$35.00

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