Effects of die geometry on variation of the deformation rate in equal channel angular pressing

• Published in: Metals and materials international Vol. 15; no. 3; pp. 439 - 445
• Main Authors: Han, Jun-Hyun, Chang, Hyung-Jun, Jee, Kwang-Koo, Oh, Kyu Hwan
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.06.2009; Springer Nature B.V; 대한금속·재료학회
• Subjects: Angles (geometry); Channels; Characterization and Evaluation of Materials; Chemistry and Materials Science; Curvature; Deformation; Engineering Thermodynamics; Equal channel angular pressing; Finite element analysis; Geometry; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Mathematical analysis; Metallic Materials; Processes; Shear deformation; Solid Mechanics; Studies; Tensors; 재료공학; deformation rate; oblique angle; equal channel angular pressing (ECAP); maximum shear deformation; curvature angle; zero dilatation line
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-009-0439-3

The deformation behavior within the deformation zone of a workpiece during equal channel angular pressing (ECAP) was investigated using the finite element method. The effects of die geometry on the variations of normal and shear deformations were studied with a deformation rate tensor ( D ). The zero dilatation line, at which the normal components (D 11 and D 22 ) of the deformation rate tensor ( D ) are zero, in the die coincided with the line of intersection of the two die channels irrespective of die geometry such as curvature angle (Ψ) and oblique angle (Φ), while the maximum shear line, at which the shear components (D 12 and D 21 ) of the deformation rate tensor ( D ) have maximum value, is dependant on the die geometry