Open AccessThe microstructure evolution and mechanical properties improvement of the AZ61 alloy by adding Sc
Author(s) -
Honggang Zhang,
Jinhui Wang,
Ma Hai,
Yuan Yuan,
Yongfeng Li,
Yanzhuo Liu,
Lei Zhang,
Peipeng Jin
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac3f5f
Subject(s) - microstructure , alloy , ultimate tensile strength , materials science , precipitation , phase (matter) , metallurgy , grain size , 6063 aluminium alloy , chemistry , physics , organic chemistry , meteorology
The improvement of mechanical properties and the microstructure evolution through adding Sc to AZ61magnesium alloy were studied. The results indicated that the Mg 17 Al 12 phase in the extruded AZ61 alloy was mainly distributed around the sub-structured and fine deformed grains, resulting in the nonuniform microstructure. The addition of Sc could effectively suppress the band-like precipitation of Mg 17 Al 12 phase and improve the uniformity of microstructure. The grain sizes of the extruded alloys showed a trend of first decreasing and then increasing with the increase of Sc, which was mainly attributed to the secondary phase. The AZ61–0.5Sc alloy exhibited the best mechanical properties, its ultimate tensile strength and yield strength were 14.8MPa and 40.8MPa higher than those of the extruded AZ61 alloy, respectively, which was ascribed to the fine grains and abundant secondary phase in the alloy.