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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Schematic diagram of three types of polycrystalline geometry models: (a) model without PFZ; (b) model with complete PFZ per grain; (c) model that separates the PFZ into multiple regions; (d) local enlargement in (c).