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Effect of different calcium contents on the microstructure and mechanical properties of Mg‐5Al‐1Bi‐0.3Mn magnesium alloy
Author(s) -
Xiaoping Luo,
Sue Dang,
Yaqing Zhang
Publication year - 2015
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22446
Subject(s) - magnesium , microstructure , calcium , magnesium alloy , alloy , materials science , metallurgy
The effect of different Ca contents on the microstructure and mechanical properties of Mg‐5Al‐1Bi‐0.3Mn (AMB501) magnesium alloys was investigated by conventional melting and casting technique using different Ca contents (1.0, 2.0, and 3.0 wt %). Increasing the Ca content resulted in higher hardness and yield strength, but decreased elongation. The improved tensile properties of the AM50‐1Bi‐ x Ca alloys were due to the changes in AMB501 alloy microstructure when the Ca content increased, as demonstrated by scanning electron microscope, energy dispersive spectrum, and X‐ray diffractometer. The alloy microstructure indicated that the amount of β‐Mg 17 Al 12 phase on grain boundaries decreased and the morphology of β‐Mg 17 Al 12 phase on grain boundaries changed from quasicontinuous‐net shape to dispersed particles. The Mg 17 Al 12 phase disappeared and a new secondary phase Al 2 Ca appeared after a 3.0 wt % Ca addition. Microsc. Res. Tech. 78:65–69, 2015 . © 2014 Wiley Periodicals, Inc.