@article { , title = {An Al-Si-Ti hierarchical metal-metal composite manufactured by co-spray forming}, abstract = {Spray forming with co-injection of a solid particulate phase to form a homogeneous distribution within the final spray formed billet has been studied as a new route to manufacturing metal-metal composites at large scale with negligible oxide. 12 wt\%Ti particles were co-injected into an atomised Al alloy droplet spray and co-deposited to form a ∼300 kg billet at Peak Werkstoff GmbH, Germany. The microstructure comprised refined equiaxed α-Al grains (∼5 μm), spherical Si particles (∼1 μm) and uniformly distributed Ti particles (∼80 μm). Sections of the billet were extruded under a range of conditions into long strips 20 mm wide and 6 mm, 2.5 mm and 1 mm thickness. At high strains, the Ti particles were deformed into continuous fibres of a few microns in thickness. The large interfacial area between the fcc α-Al and hcp Ti inhibited dislocation motion and enhanced tensile properties. Accumulative roll bonding was then performed to higher total strains, while maintaining a constant cross-section, reducing the Ti fibres to sub-micron thickness. The fibres were studied by extraction after selective dissolution of the α-Al matrix. There was no interfacial reaction between α-Al and Ti or any measurable oxide formation.}, doi = {10.1016/j.jmatprotec.2011.07.001}, issn = {0924-0136}, issue = {12}, journal = {Journal of Materials Processing Technology}, note = {Batch 005. Output ID 36890.}, pages = {2045-2049}, publicationstatus = {Published}, publisher = {Elsevier}, url = {https://hull-repository.worktribe.com/output/405389}, volume = {211}, keyword = {Specialist Research - Other, Co-spray forming, Metal–metal composite, Extrusion, Accumulated roll-bonding (ARB), Electron backscattered diffraction (EBSD)}, year = {2011}, author = {Kelly, A. J. and Mi, J. and Sinha, G. V. and Krug, P. and Crosa, F. and Audebert, F. and Grant, P. S.} }