The effects of Sn content on the corrosion behavior and mechanical properties of Mg-5Gd-3Y-xSn-0.5Zr alloys.
RSC Adv
; 11(3): 1332-1342, 2021 Jan 04.
Article
en En
| MEDLINE
| ID: mdl-35424124
The effects of Sn content on the corrosion behavior and mechanical properties of Mg-5Gd-3Y-0.5Zr alloy were studied by SEM, EDS, XRD and electrochemical testing. Results show that Sn can refine the grain size and promote the precipitation of Mg5(Gd,Y) phase. When the Sn content is 1.5-2 wt%, a needle-like Mg2Sn phase will be precipitated in the alloy. Mg-5Gd-3Y-1Sn-0.5Zr alloy had the lowest corrosion rate, which is attributed to the barrier effect of the grain boundary and dispersed Mg5(Gd,Y) phase on corrosion. However, the Mg2Sn phase formed by excessive Sn addition will accelerate galvanic corrosion. At the same time, Mg-5Gd-3Y-1Sn-0.5Zr alloy had best mechanical properties. In 1.5Sn and 2Sn alloys, the cleavage effect of the needle-like Mg2Sn phase on the matrix reduced mechanical properties.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
RSC Adv
Año:
2021
Tipo del documento:
Article
Pais de publicación:
Reino Unido