Effects of Gd on Microstructure of Mg-Al Magnesium Alloy

Ke Jie Li

doi:10.4028/www.scientific.net/AMR.821-822.860

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Effects of Gd on Microstructure of Mg-Al Magnesium Alloy

Abstract:

The effects of Gd on microstructure of AZ71 magnesium alloy were studied by optical microscope, SEM and X-ray diffraction analyzer. The results show that the alloy mainly contained α-Mg matrix, eutectic α (Mg)+β (Mg₁₇Al₁₂) phase and Al₂Gd phase. The microstructure of alloy was refined and homogeneous by Gd. The volume fraction of β phase is decreased with the addition of Gd, and the β-phase are congregated and coarsened with the excessive Gd.