Sensitivity analysis of the ECAE process via 2k experiments design

AUTOR(ES)

Medeiros, Neil de, Moreira, Luciano Pessanha, Bressan, José Divo, Lins, Jefferson Fabrício Cardoso, Gouvêa, Jayme Pereira de

FONTE

Matéria (Rio de Janeiro)

DATA DE PUBLICAÇÃO

2010

RESUMO

In this work the theoretical solutions based upon the upper-bound theorem recently proposed by Pérez and Luri [Mech. Mater. 40 (2008) 617] for the equal channel angular extrusion process (ECAE) are analyzed by performing a 25 central composite factorial analysis. The uniaxial mechanical properties of commercial pure aluminium are considered by assuming isotropic nonlinear work-hardening combined to von Mises and Drucker isotropic yield criteria to predict the ECAE load and the effective plastic strain. From the proposed 25 factorial analysis, the main parameters affecting the ECAE pressure may be ranked as: (1) Friction factor, (2) die channels intersection angle, (3) outer and (4) inner die corners fillet radii and lastly, (5) plunger velocity. Alternatively, the effective plastic strain is mainly controlled by the die channels intersection angle and, in a less extent, by the outer and inner die corners fillet radii.

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