Experimental Identification and Validation of a Crystal Plasticity Model for a Low Carbon Steel on Different Length Scales
Micro-macro approaches are of increasing importance for metal forming simulations and, accordingly, the number of new micro-macro models is increasing as well. Thus, there is a need for adequate identification and validation methods for such models. These methods can be based on experiments on the p...
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Published in | International journal of material forming Vol. 3; no. Suppl 1; pp. 65 - 68 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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Paris
Springer-Verlag
01.04.2010
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Abstract | Micro-macro approaches are of increasing importance for metal forming simulations and, accordingly, the number of new micro-macro models is increasing as well. Thus, there is a need for adequate identification and validation methods for such models. These methods can be based on experiments on the polycrystalline scale (macro scale), but the use of experiments on the individual single-crystal grain scale (micro scale) has been suggested as well. In this presentation, experiments on both scales and, in parallel, FEM-simulations are presented, in order to compare the results of both approaches. All specimens stem from a rolled sheet of the deep-drawing steel DC04. In addition to the usual macroscopic shear and tensile tests, microscopic indenter tests have been performed. From the micro-indentation tests, which have been applied to single grains of the polycrystalline DC04 steel sheet, various types of deformation data can be measured. Within this presentation we will focus on orientation changes induced by spherical-indentation in the region below the indent, which have been measured using micron-resolution 3D x-ray microscopy and simulated using FEM. In addition, the sensitivity of the calculated orientation changes with respect to {110} versus {112} slip planes is discussed. |
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AbstractList | Micro-macro approaches are of increasing importance for metal forming simulations and, accordingly, the number of new micro-macro models is increasing as well. Thus, there is a need for adequate identification and validation methods for such models. These methods can be based on experiments on the polycrystalline scale (macro scale), but the use of experiments on the individual single-crystal grain scale (micro scale) has been suggested as well. In this presentation, experiments on both scales and, in parallel, FEM-simulations are presented, in order to compare the results of both approaches. All specimens stem from a rolled sheet of the deep-drawing steel DC04. In addition to the usual macroscopic shear and tensile tests, microscopic indenter tests have been performed. From the micro-indentation tests, which have been applied to single grains of the polycrystalline DC04 steel sheet, various types of deformation data can be measured. Within this presentation we will focus on orientation changes induced by spherical-indentation in the region below the indent, which have been measured using micron-resolution 3D x-ray microscopy and simulated using FEM. In addition, the sensitivity of the calculated orientation changes with respect to {110} versus {112} slip planes is discussed. |
Author | Bertram, A. Hoffmann, T. Shim, S. Tischler, J. Z. Larson, B. C. |
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Keywords | low carbon steel micro-indentation identification validation crystal plasticity lattice rotations |
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References | ZaafaraniN.RaabeD.RotersF.ZaeffererS.On the origin of deformation-induced rotation patterns below nanoindentsActa Mater.2008563142 YangW.LarsonB. C.PharrG. M.IceG. E.BudaiJ. D.TischlerJ. Z.LiuW.Deformation Microstructure Under Microindents in Single-Crystal Cu Using Three-Dimensional X-Ray Structural MicroscopyJ. Mater. Res.20041916672 A. Bertram. Elasticity and Plasticity of Large Deformations. Springer-Verlag, 2008. HutchinsonJ. W.Bounds and self-consistent estimates for creep of polycrystalline materialsProc. Soc. London, Ser. A19763481652101127 T. Hoffmann, J. Kalisch, A. Bertram, S. Shim, J. Z. Tischler, H. Bei, and B. C. Larson. Experimental Identification and Validation of Models in Micro and Macro Plasticity. Proc. 1st Int. Conf. Mat. Mod., to appear, 2010. BohlkeT.RisyG.BertramA.Finite element simulation of metal forming operations with texture based material modelsModell. Simul. Mater. Sci. Eng.200614365387 SeegerA.Experimental evidence for the {110} ↔ {112} transformation of the screw-dislocation cores in body-centred cubic metalsPhys. Stat. Sol.20042014R21R24 708_CR1 708_CR2 708_CR3 708_CR4 708_CR5 708_CR6 708_CR7 |
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SubjectTerms | CAE) and Design Computational Intelligence Computer-Aided Engineering (CAD Engineering Machines Manufacturing Materials Science Mechanical Engineering Multiscale approaches: A. M. Habraken Processes |
Title | Experimental Identification and Validation of a Crystal Plasticity Model for a Low Carbon Steel on Different Length Scales |
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