Extrusion textures in Al, 6061 alloy and 6061/SiCp nanocomposites

XIA JIANG; MARINA GALANO; FERNANDO AUDEBERT

MATERIALS CHARACTERIZATION

ELSEVIER SCIENCE INC

Lugar: Amsterdam; Año: 2014 vol. 88 p. 111 - 118

1044-5803

The 6061 alloymatrix composites reinforcedwith 10 wt.%and 15 wt.% of SiC nanoparticleswith an average diameter of ~500 nmwere hot extruded in strip shape fromballmilled 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 thematrix. Pure Al and 6061 alloy develop a typical β fibre texture after extrusion in strip shape. For 6061/SiCp nanocomposites, the intensities ofmajor texture components decreasewith increasing amount of SiC particles. The total intensities of Brass, Dillamore and S components have decreased by 19% for 6061/10 wt.% SiCp and 40% for 6061/15 wt.% SiCp 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.