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Title: Extrusion textures in Al, 6061 alloy and 6061/SiC{sub p} nanocomposites

The 6061 alloy matrix composites reinforced with 10 wt.% and 15 wt.% of SiC nanoparticles with an average diameter of ∼ 500 nm were hot extruded in strip shape from ball milled powders. The microstructures and textures of the hot extruded nanocomposites have been investigated by means of three dimensional orientation distribution functions and electron backscatter diffraction (EBSD) techniques. Pure Al and 6061 alloy extruded strips from atomised powders have been produced for comparison purposes. The results show that the non-deformable SiC particulates have a strong influence on the formation of extrusion textures in the matrix. Pure Al and 6061 alloy develop a typical β fibre texture after extrusion in strip shape. For 6061/SiC{sub p} nanocomposites, the intensities of major texture components decrease with increasing amount of SiC particles. The total intensities of Brass, Dillamore and S components have decreased by 19% for 6061/10 wt.% SiC{sub p} and 40% for 6061/15 wt.% SiC{sub p} composites when compared with the 6061 alloy. EBSD analysis on local grain orientations shows limited Al grain rotations in SiC rich zones and decreased texture intensities. - Highlights: • The effect of nano-SiCp to the extrusion texture of Al alloy matrix was analysed. • The Intensitymore » of major texture components decreases with increasing amount of SiCp. • Deformation zones with limited Al grain rotations formed in SiCp rich zones.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Department of Materials, University of Oxford, Parks Road, OX1 3PH Oxford (United Kingdom)
  2. (Argentina)
  3. (United Kingdom)
Publication Date:
OSTI Identifier:
22288742
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 88; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BACKSCATTERING; BRASS; COMPOSITE MATERIALS; ELECTRON DIFFRACTION; EXTRUSION; GRAIN ORIENTATION; METALS; NANOSTRUCTURES; PARTICULATES; POWDERS; SILICON CARBIDES; TEXTURE