A TOP-DOWN MULTISCALE ANALYSIS FOR DERIVING LOCAL MATERIAL PROPERTIES OF ADDITIVELY MANUFACTURED AL-SI ALLOY

Ruslan Balokhonov, Aleksandr Zemlianov, Artur Shugurov, Diana Gatiyatullina, Ivan Ivashov, Vasilii Balokhonov, Varvara Romanova

DOI Number
10.22190/FUME241230020B
First page
Last page

Abstract


A Top-Down approach is proposed for the numerical-experimental determination of local material properties of an additively manufactured AlSi12 alloy possessing clearly expressed hierarchical structure. A thin-walled product was fabricated by wire electron beam additive technology. The alloy multiscale structure is studied experimentally by optical, scanning and transmission electron microscopy. The compression and nanoindentation mechanical tests are carried out. Based on the experimental data, the finite element models of a layered structure at the macrolevel, dendritic and composite cellular structures at the mesolevel, and a composite structure comprising an aluminum matrix and silicon particles at the microlevel are created. The proposed Top-Down analysis assumes sequential macro-meso-micro structure-based numerical simulations to derive the mechanical properties of aluminum in dendrites at the microlevel and aluminum in the eutectic at the submicron level. The stress concentration and the plastic strain localization in dendritic, cellular and composite structures are analyzed. It was found at the mesoscale that the eutectic material experiences more shear stresses than the aluminum dendrites, with the highest stresses being observed in between the closely located dendrites. The volumetrically tensile and pure shear regions, as well as the regions of low elastic strains, are found after 30% compression.

Keywords

Multiscale analysis, Additive manufacturing, Aluminum-silicon alloys, Microstructure-based numerical simulation, Plastic deformation

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ISSN: 0354-2025 (Print)

ISSN: 2335-0164 (Online)

COBISS.SR-ID 98732551

ZDB-ID: 2766459-4