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

被引：8

作者：

Trudonoshyn, O. ^{[1
,2
]}

机构：

[1] Vyatskiy State Univ, Dept Mat Sci & Design Bas, Moscow 610000, Russia

[2] Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, D-91058 Erlangen, Germany

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2020年 / 121卷 / 07期

关键词：

Al-Mg-Si alloys; lithium; microstructure; phase diagrams; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; LI ADDITION; MICROSTRUCTURE;

D O I：

10.1134/S0031918X2007011X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

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.

引用

页码：701 / 707

页数：7

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