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Vol.45, No.8, 473 ~ 478, 2007
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| Title |
| Mathematical Modeling ; Analysis of Front Pressure Equal Channel Angular Pressing using the Finite Element Method |
| 김형섭 Hyoung Seop kim , 홍순익 Sun Ig Hong , 윤승채 Seung Chae Yoon , 복천희 Choen Hee Bok |
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| Abstract |
| Equal channel angular pressing (ECAP) is a promising severe plastic deformation method for grain refinement of metallic materials. The properties of the materials are strongly dependent on the shear plastic deformation behavior during ECAP, which is controlled mainly by die geometry, material properties, and process conditions. In the ECAP, it is important to obtain uniform strain distribution for fabricating the workpiece without processing defects. The recently developed front pressure ECAP can impose higher hydrostatic pressure and increase the strain distribution level the material, preventing surface defects on workpiece by the tensile stress. In this study, the plastic deformation behaviour of the materials during ECAP with front pressure was investigated using the commercial two-dimensional finite element code (ABAQUS). The homogeneity within the workpiece was analyzed in terms of strain contour, path plot and statistics of strain distribution. |
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| Key Words |
| equal channel angular pressing, sever plastic deformation, front pressure equal channel angular pressing, FP-ECAP, finite element method, strain homogeneity, statistics of stain distribution |
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