Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 51, Issue 5, Pages 2509-2522Publisher
SPRINGER
DOI: 10.1007/s11661-020-05693-5
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With the help of density functional theory (DFT) calculations, Mg-Sc-Y alloys with various Y content were designed and produced. The single-phase Mg-Sc-Y alloys were composed of a typical peritectic microstructure with internal Sc-rich zones surrounded by Y-rich zones. With increasing Y content, the hydrogen evolution rates decreased significantly to 0.13 mL/cm(2)/day and increased slightly afterward. This was attributed to the combined effect of a decrease in the thermodynamic driving force for corrosion, surface layer improvement, and an increase in the number of galvanic couples between the Sc-rich and Y-rich zones.
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