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

Journal Article · Sat Feb 15 04:00:00 EST 2014 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2013.11.009· OSTI ID:22288742

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 Intensity of major texture components decreases with increasing amount of SiCp. • Deformation zones with limited Al grain rotations formed in SiCp rich zones.

• OSTI ID: 22288742
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 88; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BACKSCATTERING
BRASS
COMPOSITE MATERIALS
ELECTRON DIFFRACTION
EXTRUSION
GRAIN ORIENTATION
METALS
NANOSTRUCTURES
PARTICULATES
POWDERS
SILICON CARBIDES
TEXTURE