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Deformation Field Analysis in Equal Channel Angular Extrusion of Metals Using Asymmetric Flow Function
Author(s) -
Hasani Arman,
Toth Laszlo S.
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500070
Subject(s) - equal channel angular extrusion , materials science , deformation (meteorology) , flow line , flow (mathematics) , field (mathematics) , material flow , line (geometry) , plasticity , extrusion , metallurgy , aluminium , mechanics , geometry , composite material , physics , mathematics , mechanical engineering , pure mathematics , engineering , biology , ecology
The trajectory and the corresponding plastic deformation of a material element during equal channel angular extrusion (ECAE) are analyzed with the help of a flow line function applicable for any ECAE die angle. The function contains the following three parameters: the parameter n that describes the sharpness of the line and the α and m parameters that account for the asymmetry of the flow line. The approach permits to determine the velocity field, the strain rate field, and, in general, the shape of the plastic deformation zone in ECAE experiments even for flow lines that are asymmetric with respect to the ECAE geometry. The flow line function was applied to flow lines observed in 90° and 120° ECAE of commercially pure aluminum as well as for 135° ECAE of pure copper to describe the characteristics of the deformation field and the evolution of the crystallographic texture.