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

• Main Authors: Chaosheng Ma, Wenbo Yu, Xufeng Pi, Antoine Guitton
• Format: Article
• Language: English
• Published: KeAi Communications Co., Ltd. 2020-12-01
• Series: Journal of Magnesium and Alloys
• Subjects: Mg–Al–Ca alloy; Al8Mn4Gd phase; Microstructure and mechanical properties; Hot rolling
• Online Access: http://www.sciencedirect.com/science/article/pii/S2213956720301481

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).