Abstract
The Al-8Ce-3Y high pressure die-casting alloy was investigated through characterization and first-principles simulation. The alloy shows excellent comprehensive mechanical properties among Al-Ce system alloys. Also it owns a tensile strength of 87 MPa at 350 °C after 200 h holding, which is much superior than Mahle piston Al alloys. Mechanical improvement is attributed to formation submicron Al4(Ce,Y) fiber with Y addition uniformly distributed. Al4(Ce,Y) phase is stable considering formation energy and mixing enthalpy. This study provides superior mechanical performance of Al-Ce alloy to alleviate the low strength at both room and high temperatures.
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