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http://dx.doi.org/10.5228/KSPP.2006.15.7.524

Finite Element Analysis of Continuous Rotary-Die Equal Channel Angular Pressing  

Yoon, Seung-Chae (충남대학교 대학원 나노공학부)
Seo, Min-Hong (POSCO 기술연구소)
Kim, Hyoung-Seop (충남대학교 나노공학부)
Publication Information
Transactions of Materials Processing / v.15, no.7, 2006 , pp. 524-528 More about this Journal
Abstract
Although equal channel angular pressing (ECAP), imposing large plastic shear strain deformation by moving a workpiece through two intersecting channels, is a promising severe plastic deformation method for grain refinement of metallic materials, its batch type characteristic makes ECAP inefficient for multiple-passing. Rotary-die ECAP (RDECAP) proposed by Nishida et al. can achieve high productivity by using continuous processing without taking out the samples from the channel. However, plastic deformation behavior during RD-ECAP has not been investigated. In this study, material plastic flow and strain hardening behavior of the workpiece during RD-ECAP was investigated using the finite element method. It was found that plastic deformation becomes inhomogeneous with the number of passes due to an end effect, which was not found seriously in ECAP. Especially, decreasing corner gap with increasing the number of passes was observed and explained by the strain hardening effect.
Keywords
Rotary-die Equal Channel Angular Pressing; Multi-pass; Continuous Process; Finite Element Analysis; Severe Plastic Deformation; Grain Refinement; Deformation Homogeneity;
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