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A comparative study of an isotropic and anistropic model to describe the micro‐indentation of TWIP steel
Author(s) -
Sridhar Praveen,
R.G. Prasad Mahesh,
Bilz Raphael,
W. Klein Matthias,
Vajragupta Napat,
M. de Payrebrune Kristin,
Smaga Marek
Publication year - 2021
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.202000224
Subject(s) - twip , indentation , materials science , isotropy , plasticity , anisotropy , nanoindentation , crystal plasticity , composite material , grain size , crystal twinning , microstructure , optics , physics
In grinding, the crystal grain size of the workpiece material is relatively same range compared to the removal depth. This raises a question if an anisotropic material model, which considers the effect of the crystal grain size and orientations, would better predict the process forces when compared to an isotropic material model. Initially, a simple micro‐indentation process is chosen to compare the two models. In this work, a crystal plasticity model and an isotropic Johnson‐Cooke plasticity model are employed to simulate micro‐identation of a twinning induced plasticity (TWIP) steel. The results of the two models are compared using the force‐displacement curves from the micro‐indentation experiments. In the future, the study will be extended to describe the material removal process during a single grit scratch test.