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Interaction and Multiscale Mechanics
  Volume 4, Number 2, June 2011, pages 155-164
open access

Influence of grain interaction on lattice strain evolution in two-phase polycrystals
Tong-Seok Han

    The lattice strain evolution within polycrystalline solids is influenced by the crystal orientation and grain interaction. For multi-phase polycrystals, due to potential large differences in properties of each phase, lattice strains are even more strongly influenced by grain interaction compared with single phase polycrystals. In this research, the effects of the grain interaction and crystal orientation on the lattice strain evolution in a two-phase polycrystals are investigated. Duplex steel of austenite and ferrite phases with equal volume fraction is selected for the analysis, of which grain arrangement sensitivity is confirmed in the literature through both experiment and simulation (Hedstrom et al. 2010). Analysis on the grain interaction is performed using the results obtained from the finite element calculation based on the model of restricted slip within crystallographic planes. The dependence of lattice strain on grain interactions as well as crystal orientation is confirmed and motivated the need for more in-depth analysis.
Key Words
    polycrystals; grain interaction; elasticity; plasticity; finite element method.
Tong-Seok Han: School of Civil and Environmental Engineering, Yonsei University, Seoul 120-749, Korea

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