Microstructure and mechanical properties of Gd-modified AZ80 magnesium alloys

The microstructure and mechanical properties of AZ80 alloy with different Gd contents were investigated. The results reveal that a minor addition of Gd could lead to a change in the type of second phase particles from Al–Mn to Al–Gd–Mn, and the primary rare earth phase is Al 8 GdMn 4 instead of Al 2...

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Bibliographic Details
Published in:Rare metals 2022-12, Vol.41 (12), p.4194-4200
Main Authors: Jiang, Nan, Meng, Ling-Gang, Zhang, Xing-Guo, Chen, Lei, Fang, Can-Feng, Hao, Hai
Format: Article
Language:English
Subjects:
Aluminum
Biomaterials
Chemistry and Materials Science
Elongation
Energy
Gadolinium
Magnesium base alloys
Manganese
Materials Engineering
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Nanoscale Science and Technology
Physical Chemistry
Tensile tests
Ultimate tensile strength
Yield strength
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Summary:The microstructure and mechanical properties of AZ80 alloy with different Gd contents were investigated. The results reveal that a minor addition of Gd could lead to a change in the type of second phase particles from Al–Mn to Al–Gd–Mn, and the primary rare earth phase is Al 8 GdMn 4 instead of Al 2 Gd in the AZ80–0.3Gd alloy. New strip-like Al 3 Gd and block-shaped Al 2 Gd phases are formed successively with the increase of Gd content. Al 2 Gd phase becomes the dominating rare earth phase in AZ80–2.0Gd and AZ80–4.0Gd alloys. Tensile test indicates that the mechanical properties are improved obviously with a proper Gd content. However, excessive Gd addition results in the decrease of mechanical properties due to the formation of coarse block-shaped Al 2 Gd phase. AZ80–0.9Gd alloy exhibits the optimal mechanical properties among all the experimental alloys, in which the ultimate tensile strength (UTS), yield strength (YS) and elongation are 210, 130 MPa and 8.2%, respectively.
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-016-0868-3