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Deformation behaviour of small scale cp‐titanium specimen with large grains
Author(s) -
Bischof Robert,
Böhme Luisa,
Kuhn Charlotte,
Müller Ralf,
Kerscher Eberhard
Publication year - 2018
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201800360
Subject(s) - materials science , electron backscatter diffraction , microstructure , slip (aerodynamics) , anisotropy , composite material , titanium , deformation (meteorology) , tensile testing , nanocrystalline material , ultimate tensile strength , diffraction , metallurgy , optics , thermodynamics , physics , nanotechnology
To describe the material behaviour of the microstructure of commercially pure (cp‐) titanium with the Finite Element (FE) Method, a crystal plastic material model is used. The anisotropic plastic deformation is considered by specifying the slip systems of the hexagonal‐closed‐packed (hcp) crystal structure. To circumvent the difficulties associated with possible non‐uniqueness of the set of active slip systems, a rate‐dependent formulation is used. Because of the volume preserving plastic deformation, locking effects can arise, which are dealt with by a modified F‐bar deformation gradient. To investigate the material behaviour of cp‐titanium small scale tensile test simulations are performed. Electronic backscatter diffraction (EBSD) investigations of the sample provides the specific grain orientations of the microstructure to perform realistic simulations.