Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 25, Issue 5, Pages 554-563Publisher
SPRINGER
DOI: 10.1007/s12613-018-1602-y
Keywords
cerium; eutectic Si; Fe-rich phases; squeeze-casting; mechanical properties
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Funding
- International Science and Technology Cooperation Program of China [2014DFA53050]
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The effect of cerium (Ce) addition on the eutectic Si, beta-Al5FeSi phase, and the tensile properties of A380 alloy specimens prepared by squeeze-casting were studied by optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The experimental results showed that Ce more effectively modified the eutectic Si and refined the beta-Al5FeSi. The refinement effect significantly increased under a specific pressure of 100 MPa with the addition of Ce from 0.1wt% to 0.9wt%. In contrast, the average length and the aspect ratio of the eutectic Si and beta-Al5FeSi exhibited their optimal values when the content of the added Ce was greater than 0.5wt%. Needle-like Al8Cu4Ce was precipitated with the addition of excessive Ce; hence, the mechanical properties of A380 gradually decreased with increasing Ce content in the range from 0.3wt% to 0.9wt%.
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