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Scaled-up ECAP with enhanced productivity

Olejnik, L. and Rosochowski, A. (2008) Scaled-up ECAP with enhanced productivity. Steel Research International, 2. pp. 439-447. ISSN 1611-3683

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Abstract

The well known method of equal channel angular pressing (ECAP), used for batch production of ultrafine grained (UFG) bulk metals, suffers from low productivity which is related to substantial loses of material in a multi-pass process and a low value of plastic strain cumulated in a single pass. A multi-turn ECAP process was proposed to increase the efficiency and minimize the cost. The production procedure was optimised experimentally using a tool set for small cross-section billets. The results obtained for ECAP of aluminium billets are shown for the classical one-turn channel and the proposed two-turn channel. The whole process chain which enables production of UFG metals using only 4 passes is described. It comprises the main ECAP operation and auxiliary procedures, e.g. lubrication suitable for the aluminium billets. The results of metallurgical testing are presented to confirm the process ability to refine grain structure. Finally, the design of a scaled-up ECAP rig, capable of processing 26x26mm2 cross-section billets, is presented, together with the ECAP experimental results and extensive force analysis.

Item type: Article
ID code: 13929
Notes: Steel Research International 79 (2008), Special Edition Metal Forming Conference 2008, Volume 2
Keywords: ufg, ecap, steel, metals, Manufactures, Engineering design, Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics
Subjects: Technology > Manufactures
Technology > Engineering (General). Civil engineering (General) > Engineering design
Department: Faculty of Engineering > Design, Manufacture and Engineering Management
Related URLs:
Depositing user: Dr Andrzej Rosochowski
Date Deposited: 15 Jan 2010 14:03
Last modified: 04 Sep 2014 22:24
URI: http://strathprints.strath.ac.uk/id/eprint/13929

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