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Title of Journal: J of Materi Eng and Perform

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Abbravation: Journal of Materials Engineering and Performance

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Springer US

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DOI

10.1002/jcb.22932

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1544-1024

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A Comparison Between ECAP and Conventional Extrusi

Authors: R Derakhshandeh Haghighi S A Jenabali Jahromi A Moresedgh M Tabandeh Khorshid
Publish Date: 2011/12/30
Volume: 21, Issue: 9, Pages: 1885-1892
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Abstract

In this study two powder consolidation techniques equal channel angular pressing ECAP and extrusion were utilized to consolidate attritioned aluminum powder and Al5 vol nanoAl2O3 composite powder The effect of ECAP and extrusion on consolidation behavior of composite powder and mechanical properties of subsequent compacts are presented It is found that three passes of ECAP in tube at 200 °C is capable of consolidating the composite to 9929 of its theoretical density whereas after hot extrusion of the composite the density reached to 985 of its theoretical density Moreover extrusion needs higher temperature and pressing load in comparison to the ECAP method Hardness measurements show 17 and 12 times higher microhardness for the consolidated composite and pure aluminum after ECAP comparing with the extruded ones respectively Microstructural investigations and compression tests demonstrate stronger bonds between the particles after three passes of ECAP than the extrusion Furthermore the samples after three passes of ECAP show better wear resistance than the extruded ones

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