Warm compaction of aluminium alloy Alumix 123

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http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/1734 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/1734 http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/1734 archive 4031 disk0/00/00/07/09 2010-05-28 10:57:38 2019-01-23 09:52:41 2011-07-19 16:22:08 thesis show 0 Meluch Lubos Chang I. T. H. University of Birmingham Warm compaction of aluminium alloy Alumix 123 unpub TN 10col_ephy The aims of this study were to understand and improve the mechanical properties of aluminium Al-Cu-Si-Mg P/M alloy Alumix 123 by application of a warm compaction process. They were achieved by investigating the effect of (a) compaction pressure/temperature, (b) admixed lubricants (e.g. Acrawax C and Kenolube P11) on green/sintered density and mechanical properties of compacts. It was found that compaction at 110ºC led to (1) a reduction in the ejection force up to ~ 40 % and (2) an increase in sintered density up to ~ 98 % of theoretical density. After heat treatment at 200ºC for 5 hours (T6), the tensile strength reached ~ 365 MPa and hardness of ~ 126 HV was achieved. Further improvement of mechanical properties of aluminium alloy Alumix 123 can be achieved by reducing the amount of admixed lubricant to 0.5 wt %, and using Acrawax C as the lubricant rather than Kenolube P11. Taguchi analysis was used to identify which parameter (compaction pressure, temperature and lubricant content) affected the densities and mechanical properties of Alumix 123 specimens with single lubricants the most. It was observed that the most effective parameter in warm compaction of Alumix 123 specimens is the lubricant content. 2010-07 2009-09 graduation eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. Ecka Granulate GmbH & Co KG public 237 University of Birmingham School of Metallurgy and Materials d_ph FALSE na 2010-07 graduation