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Crystal plasticity modelling on plastic anisotropy, localization and texture evolution

By Junhe Lian (Steel Institute, RWTH Aachen University)
Co-authors: Wenqi Liu (RWTH Aachen University)
Fuhui Shen (RWTH Aachen University)
Sebastian Munstermann (RWTH Aachen University)


In the integrated computational materials engineering (ICME) roadmap, correlation of the material microstructure and its mechanical deformation properties by using a multiscale modelling approach is of high interest for material production and component forming industry. Therefore, the aim of this study to predict the plastic anisotropy and the cold formability of bcc steels by using the crystal plasticity model based on the microstructural features of materials. One of the most important features that decides the deformation behaviour of metals is the texture and its evolution during deformation. The key to achieve a successful prediction of the plastic anisotropy and the cold formability is to properly couple the texture and its evolution effects on the deformation behaviour. In this study, the plastic anisotropy is characterized by the uniaxial tension tests along different loading directions and the cold formability is characterized by the forming limit curve using the Nakajima tests. In addition, texture evolution at different deformation stages is also measured for loadings at different directions. These results are all compared with the numerical prediction by the crystal plasticity model and the correlation between plastic anisotropy, localization and texture evolution is also established.

Ⓒ Photos:Toerisme Leuven