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Quantifying Grain Boundary and Orientation Effects on Copper under Compression: A Crystal Plasticity Finite Element Approach

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Abstract:

The plastic deformation behavior of polycrystalline copper is strongly governed by microstructural attributes such as grain boundaries and crystallographic orientation. In this study, the individual and coupled effects of grain size and orientation distribution on the mechanical response of copper are systematically investigated using the crystal plasticity finite element method (CPFEM). Uniaxial compression simulations are performed employing an Abaqus UMAT subroutine, and the resulting stress–strain response, slip system activity, and strain localization are examined. Polycrystalline representative volume elements (RVEs) with varying grain sizes and textures are generated to quantify their influence on flow behavior and dislocation density. The results indicate that grain refinement diminishes orientation sensitivity and the influence of individual grains, while enhancing material strength. Moreover, grain boundaries promote heterogeneous slip, localized deformation near grain edges, and increased stress–strain heterogeneity.

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Periodical:

Solid State Phenomena (Volume 390)

Pages:

97-109

DOI:

https://doi.org/10.4028/p-cF5aLT

Citation:

Cite this paper

Online since:

April 2026

Authors:

Muhammet Batuhan Paçacı*, Haluk Darendeliler

Keywords:

Crystal Plasticity, Grain Boundary, Grain Size, Simple Compression

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Creative Commons CC BY 4.0

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* - Corresponding Author

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