Journal Article

IMPULSE-2026-00130

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multiscale investigation of deformation in a dual-phase steel under non-proportional loading using in-situ neutron diffraction and crystal plasticity simulations

Maier, L. (Corresponding author) ; Walz, E.MLZ* ; Li, H. ; Rebelo-Kornmeier, J. ; Hofmann, M.MLZ* ; Li, X. ; Gan, W.MLZ* ; Volk, W. ; Hartmann, C.

2026
Elsevier Rio de Janeiro

Please use a persistent id in citations: doi:10.1016/j.jmrt.2026.08.027

Abstract: The micromechanical deformation behavior of DP800HHE steel under biaxial and non-proportional loading conditions has been analyzed. In-situ neutron diffraction experiments were combined with multiscale numerical simulations. Three loading paths were examined: (I) purely biaxial tensile loading, (II) plane strain tension followed by biaxial tension, and (III) biaxial tension followed by plane strain tension with a maximum equivalent von Mises strain gradient of 3.53%. The macroscopic stress response was obtained through finite element simulations of the experimental geometries and loading conditions. These stresses were subsequently used for comparison with crystal plasticity simulations. Using these simulations, phase-resolved lattice strains were calculated. The simulated lattice strain evolution was compared to in-situ neutron diffraction measurements for validation, enabling a detailed evaluation of the predictive capability of the crystal plasticity simulation framework for biaxial and complex non-proportional loading paths. The results show that the dislocation-density-based crystal plasticity model predicts stresses and lattice strains for these three loading paths with high accuracy, even though the phase-specific material parameters were calibrated solely from a uniaxial tensile test.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. STRESSI (STRESSI)
2. MATSCI (MATSCI)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2026

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