Abstract
Work hardening mechanisms in metals have been extensively studied with a focus on the motion of dislocations and their inhibition, and these studies have provided in-depth knowledge of the relationship between dislocations and work hardening; however, other factors also influence the work hardening mechanism. When polycrystalline metals deform, the shape of the grain boundaries must match between neighboring grains, resulting in deformation constraint between the grains. Hexagonal close-packed (HCP) single crystals exhibit greater plastic anisotropy than those in body-centered cubic (BCC) and face-centered cubic (FCC) crystals, leading to stronger deformation constraint between grains in polycrystalline HCP metals. This study investigates the effects of deformation constraint between grains on macroscopic stress–strain curves by reproducing the deformation of HCP metals using crystal plasticity finite element analysis. The results indicate that in polycrystalline HCP metals, the non-dislocation effect, constraint between grains, also significantly affects work hardening.
Published Version
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