Crystal plasticity simulation of in-grain microstructural evolution during large deformation of IF-steel

Karo Sedighiani*, Konstantina Traka, Franz Roters, Jilt Sietsma, Dierk Raabe, Martin Diehl

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
139 Downloads (Pure)

Abstract

High-resolution three-dimensional crystal plasticity simulations are used to investigate deformation heterogeneity and microstructure evolution during cold rolling of interstitial free (IF-) steel. A Fast Fourier Transform (FFT)-based spectral solver is used to conduct crystal plasticity simulations using a dislocation-density-based crystal plasticity model. The in-grain texture evolution and misorientation spread are consistent with experimental results obtained using electron backscatter diffraction (EBSD) experiments. The crystal plasticity simulations show that two types of strain localization features develop during the large strain deformation of IF-steel. The first type forms band-like areas with large strain accumulation that appear as river patterns extending across the specimen. In addition to these river-like patterns, a second type of strain localization with rather sharp and highly localized in-grain shear bands is identified. These localized features are dependent on the crystallographic orientation of the grain and extend within a single grain. In addition to the strain localization, the evolution of in-grain orientation gradients, misorientation features, dislocation density, kernel average misorientation, and stress in major texture components are discussed.

Original languageEnglish
Article number118167
Number of pages16
JournalActa Materialia
Volume237
DOIs
Publication statusPublished - 2022

Keywords

  • Crystal plasticity
  • DAMASK
  • Dislocation density
  • Microtexture
  • Polycrystalline materials
  • Shear bands

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