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Title: | Direct Chill Casting and Extrusion of AA6111 Aluminum Alloy Formulated from Taint Tabor Scrap |
Authors: | Al-Helal, K Patel, J Scamans, G Fan, Z |
Keywords: | Taint Tabor Scrap;recycling;high shear melt conditioning;direct chill casting;extrusion;PCG;paint bake simulation;cold rolling |
Issue Date: | 16-Dec-2020 |
Publisher: | MDPI |
Citation: | Al-Helal, K., Patel, J.B., Scamans, G.M. and Fan, Z. (2020) ‘Direct Chill Casting and Extrusion of AA6111 Aluminum Alloy Formulated from Taint Tabor Scrap’, Materials. MDPI AG, 13(24), 5740, pp. 1-11. doi: 10.3390/ma13245740. |
Abstract: | © 2020 by the authors. AA6111 aluminum automotive body-sheet alloy has been formulated from 100% Taint Tabor scrap aluminum. Direct chill casting with and without high shear melt conditioning (HSMC) was used to produce the AA6111 alloy billets. Both homogenized and non-homogenized billets were extruded into sheets. The optical micrographs of the melt conditioned direct chill (MC-DC) samples showed refined equiaxed grains in comparison to direct chill (DC) cast and direct chill grain refined (DC-GR) samples. Optical metallography showed extensive peripheral coarse grain (PCG) for the DC, DC-GR and MC-DC planks extruded from the homogenized standard AA6111 billets while planks extruded from modified AA6111 billets (with recrystallization inhibitors) showed thin PCG band. The co-addition of recrystallization inhibitors Mn, Zr, and Cr with elimination of the billet homogenization step had a favorable impact on the microstructure of the AA6111 alloy following the extrusion process where a fibrous grain structure was retained across the whole section of the planks. The mechanical properties of as-cast planks extruded from non-homogenized billets were similar to those extruded from homogenized billets. Eliminating the homogenization heat treatment step prior to extrusion has important ramifications in terms of processing cost reduction |
URI: | https://bura.brunel.ac.uk/handle/2438/22207 |
DOI: | https://doi.org/10.3390/ma13245740 |
Other Identifiers: | 5740 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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