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26-08-2024

Microstructure, Mechanical Properties and Tribological Behavior of Wire Electron Beam Additive Manufactured Eutectic Al–12Si Alloy

Authors: Sergei Tarasov, Ruslan Balokhonov, Veronika Utyaganova, Anna Zykova, Nikolai Savchenko, Andrey Vorontsov, Varvara Romanova, Nikolai Shamarin, Evgeny Knyazhev, Denis Gurianov, Evgeny Moskvichev

Published in: Metals and Materials International

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Abstract

Wire electron beam additive manufacturing has been used to build a wall from Al–12Si wire on an AA5056 substrate. The microstructures composed of aluminum dendrites and Al/Si eutectics have been revealed along with heat-affected bands where silicon crystals coarsened by reheating from deposition of the next layer. Fine precipitates were detected in the aluminum grains subjected to reheating. Twinning of silicon particles was found by means of TEM, which was the result of the thermal expansion mismatch stresses that appeared in cooling to the room temperatures as shown by direct FEM numerical simulations. Ultimate tensile strength (UTS) and yield stress (YS) ranged from 178–185 MPa and 104–115 MPa, respectively, as compared to 84 and 142 MPa for the as-cast alloy. Minimal wear was obtained on samples cut from the middle part of the wall. Wire additive manufacturing allowed obtaining the Al–12Si structures with equiaxed eutectic Si crystals that allowed improving tensile and compression strengths as well as wear resistance as compared to those of the as-cast alloy.

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Appendix
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Metadata
Title
Microstructure, Mechanical Properties and Tribological Behavior of Wire Electron Beam Additive Manufactured Eutectic Al–12Si Alloy
Authors
Sergei Tarasov
Ruslan Balokhonov
Veronika Utyaganova
Anna Zykova
Nikolai Savchenko
Andrey Vorontsov
Varvara Romanova
Nikolai Shamarin
Evgeny Knyazhev
Denis Gurianov
Evgeny Moskvichev
Publication date
26-08-2024
Publisher
The Korean Institute of Metals and Materials
Published in
Metals and Materials International
Print ISSN: 1598-9623
Electronic ISSN: 2005-4149
DOI
https://doi.org/10.1007/s12540-024-01785-8

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