Title: Statistical modelling of surface hardness and roughness in cold extrusion of aluminium

Authors: P. Tiernan, B. Draganescu

Addresses: Department of Manufacturing and Operations Engineering and Materials and Surface Science Institute (MSSI), University of Limerick, Limerick, Ireland. ' Department of Manufacturing and Operations Engineering and Materials and Surface Science Institute (MSSI), University of Limerick, Limerick, Ireland

Abstract: This paper describes the application of the surface response method in an attempt to define a relationship between both the surface hardness and roughness of extruded aluminium billets, and three process parameters, namely; the conical die angle, die land height and die exit diameter. A programme of experimental extrusion of aluminium was carried out in parallel with statistical modelling. An adequacy test was made on the analysed models to determine the accuracy with which the model predicted data obtained by experimental methods.

Keywords: surface response methodology; SRM; surface hardness; surface roughness; extruded aluminium billets; process parameters; conical die angle; die land height; die exit diameter; cold extrusion; statistical modelling.

DOI: 10.1504/IJMR.2008.020904

International Journal of Manufacturing Research, 2008 Vol.3 No.4, pp.452 - 470

Published online: 23 Oct 2008 *

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