Solidification and Microstructure of Mg — Al — (Ca, Sr, Ce, La) Ternary Alloys
Abstract
Solidification behavior and as-cast microstructure have been analyzed in a series of ternary Mg alloys consisting of Mg — Al — X: (Ca, Sr, Ce, La). Thermodynamic calculations of the Mg — Al — Ca, Mg — Al -Sr, and Mg — Al — Ce ternaries were conducted to predict the solidification path of the Mg — 4 Al — 4 X and Mg — 4 Al — 2 X systems. Thermal analyses of the solidification process and accompanying electron microscopy studies of as-cast microstructure were conducted on the same alloys. Scheil calculations and the experimental measurements of liquidus and solidus temperatures are compared. All microstructures consisted of primary α-Mg grains with intermetallic phases along the grain boundaries. Additions of Ca and Sr widen the solidus to liquidus gap to a much greater degree than equivalent levels of Ce and La.
- Publication:
-
Essential Readings in Magnesium Technology
- Pub Date:
- 2016
- DOI:
- 10.1007/978-3-319-48099-2_33
- Bibcode:
- 2016ermt.book..199S
- Keywords:
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- Materials Science