2D SEM And 3D XCT investigation of in-situ Al-Cu-TiB2 semi-solid forged composites
James Mathew, Animesh Mandal, Jason Warnett, Mark A. Williams, M. Chakraborty, Prakash Srirangam*
Volume 1, Issue 2, Page 180-184, Year 2016 | DOI: 10.5185/amp.2016/212
Keywords: X-ray computed tomography, semisolid forging, TiB2 particles, metal matrix composite, clusters
Abstract: The present work compares the 2D and 3D distribution of TiB2 particles in a semisolid processed Al-4.5%Cu-5wt.% TiB2 in-situ composite prepared by flux assisted synthesis. The composite was synthesized by the reaction of K2TiF6 and KBF4 salts in molten Al-4.5Cu alloy held at 800 oC for an hour. The extent of distribution of TiB2 particles was investigated using Field Emission Scanning Electron Microscopy (FESEM) and X-ray computed tomography (XCT) to obtain 2Dand 3D images respectively. The studies indicated improved distribution of TiB2 particles after semi-solid forging of composites (at 0.1 volume fraction of liquid and 50% reduction) as compared to as cast composites. The hardness of the semisolid forged composites showed a significant increase and is uniform in all directions. The increase in hardness could be attributed to particle fragmentation and its redistribution in the matrix. Further investigation will be needed to understand the mechanism of redistribution and investigate the mechanical properties of such composites in detail. Copyright © 2016 VBRI Press.