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Physics of Metals and Metallography
Published in: Physics of Metals and Metallography 7/2020

01-07-2020 | STRENGTH AND PLASTICITY

Studying the Structure of Al–Mg–Si Casting Alloys Doped by Lithium

Author: O. Trudonoshyn

Published in: Physics of Metals and Metallography | Issue 7/2020

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Abstract

The article discusses changes in the structure of Al–Mg–Si cast alloys after their additional alloying with lithium. To predict and explain the phase transformations in the studied alloys, phase diagrams were calculated using Thermo-Calc software. Thermo-Calc results are in good agreement with microstructure analysis. The morphology and chemical composition of the intermetallic phases were studied using a scanning electron microscope and EDX analysis on polished and deeply etched microsections. There were revealed several intermetallic phases in the studied alloys. It was found that the addition of lithium has a modifying effect on the structure of the studied alloys, which also leads to the formation of a new AlLiSi phase. To analyze the effect of lithium on the mechanical properties, the Brinell hardness, tensile strength, yield strength, and elongation were measured. Additional alloying with lithium leads to an increase in the strength properties of the studied alloys compared to the base alloy.
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Metadata
Title
Studying the Structure of Al–Mg–Si Casting Alloys Doped by Lithium
Author
O. Trudonoshyn
Publication date
01-07-2020
Publisher
Pleiades Publishing
Published in
Physics of Metals and Metallography / Issue 7/2020
Print ISSN: 0031-918X
Electronic ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X2007011X

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