Severe plastic deformation by equal channel angular pressing: product quality and operational details

AUTOR(ES)

Mendes Filho, Anibal de Andrade, Prados, Erika Fernanda, Valio, Gustavo Trindade, Rubert, José Benaque, Sordi, Vitor Luiz, Ferrante, Maurizio

FONTE

Materials Research

DATA DE PUBLICAÇÃO

05/08/2011

RESUMO

As a technique, Equal Channel Angular Pressing (ECAP) is simple and inexpensive. However, if die manufacture and operational details are not carefully planned and implemented, difficulties arise, which can interfere with the product characteristics and the pressing operation itself. The present paper offers guidelines on die design and manufacture, emphasizing geometry, material and heat treatment. Further, operational parameters such as lubrication, pressing temperature, deformation routes, die closure procedure and the influence of channel cross section on maximum acceptable load are described. Additionally, the effects of those variables on the product characteristics (deformation level and homogeneity) and integrity, plus process control and safety, are discussed.

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