The article presents a microstructure-based mechanical model of hexagonal close-packed (hcp) a-titanium representative of the mesoscale and analyzes the contribution of a pyramidal slip to plastic deformation. We discuss the size of a representative volume element (RVE) enabling mesoscale phenomena to be correctly reproduced, focusing on deformation-induced surface roughening (DISR) and plastic strain localization. It is shown that the ignorance of a pyramidal slip in simulations leads to overestimated stress values in an hcp material. A polycrystalline model is capable of reproducing the mesoscale phenomena until plastic strain begins to localize at the length scale comparable to the model size
Физико-технический факультет
A microstructure-based mechanical model of deformation-induced surface roughening in polycrystalline α-titanium at the mesoscale
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