Study of Mg–Al–Ca magnesium alloy ameliorated with designed Al8Mn4Gd phase

To investigate the effect of Al8Mn4Gd phase on microstructural and mechanical properties of Mg–Al–Ca magnesium alloy, two Mg–2.5Al2Ca and Mg–2.5Al2Ca-0.1Al8Mn4Gd alloys were designed and compared in this work. The results show that a small amount of Gd can significantly refine α-Mg grains and change...

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Bibliographic Details
Published in:Journal of magnesium and alloys 2020-12, Vol.8 (4), p.1084-1089
Main Authors: Ma, Chaosheng, Yu, Wenbo, Pi, Xufeng, Guitton, Antoine
Format: Article
Language:English
Subjects:
Al8Mn4Gd phase
Condensed Matter
Engineering Sciences
Hot rolling
Materials
Materials and structures in mechanics
Mechanics
Mg–Al–Ca alloy
Microstructure and mechanical properties
Physics
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Summary:To investigate the effect of Al8Mn4Gd phase on microstructural and mechanical properties of Mg–Al–Ca magnesium alloy, two Mg–2.5Al2Ca and Mg–2.5Al2Ca-0.1Al8Mn4Gd alloys were designed and compared in this work. The results show that a small amount of Gd can significantly refine α-Mg grains and change the morphology of Al2Ca particles. Indeed, the formed Al8Mn4Gd phase could serve as a heterogeneous nucleation site for the α-Mg grains and Al2Ca particles. Furthermore, the introduction of Gd not only optimized the mechanical properties of Mg–Al–Ca alloy, but also facilitated the thermal deformation (such as hot rolling).
ISSN:2213-9567
2213-9567
DOI:10.1016/j.jma.2020.08.009