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Computational mechanics‐based modeling of size‐dependent hardening in polycrystals

It has been well‐known for a number of years that the macroscopic material response of polycrystalline metals is influenced by the size and morphology of grains. Different size effects may occur, one of which is the Hall‐Petch effect. The key aim of this contribution is the computational modeling of grain‐size‐dependent hardening in polycrystals using a microstructural approach. Here, the focus is on the influence of the microscopic grain boundary conditions on the simulation results. In particular, micro‐flexible boundary conditions are discussed and compared to micro‐hard and micro‐free assumptions. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)