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

• Published in: Materials research (São Carlos, São Paulo, Brazil) Vol. 14; no. 3; pp. 335 - 339
• Main Authors: Mendes Filho, Anibal de Andrade, Prados, Erika Fernanda, Valio, Gustavo Trindade, Rubert, José Benaque, Sordi, Vitor Luiz, Ferrante, Maurizio
• Format: Journal Article
• Language: English
• Published: ABM, ABC, ABPol 01.09.2011; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
• Subjects: Channels; Cross sections; Deformation; die geometry; die manufacture; ECAP; ECAP operation; ENGINEERING, CHEMICAL; Equal channel angular pressing; Guidelines; Homogeneity; Lubrication; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; Pressing; ECAP operation; die manufacture; die geometry; ECAP
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/S1516-14392011005000045

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.