Abstract
A eutectic Al alloy containing 1.8 wt.% Fe (Al-1.8%Fe) for electric vehicles was prepared by permanent steel mold casting (PSMC) along with commercial-purity (CP) Al (99.7%). The mechanical properties including ultimate tensile strength (UTS), yield strength (YS), and elongation (ef) were evaluated by tensile testing. The electrical conductivity was measured by the phase-sensitive eddy current method. The addition of 1.8 wt.% Fe increased both the UTS and YS of the cast CP Al significantly to 86.5 and 28.3 MPa from 34.5 to 12.3 MPa. However, the ef and electrical conductivity of the cast alloy decreased to 19.8% and 48.4%IACS from 33.8% and 58.5%IACS. The large area fraction of the eutectic Al–Fe phases in the PSMC Al-1.8%Fe alloy should be responsible for the difference in mechanical and electrical properties between the PSMC Al-1.8%Fe alloy and the PSMC CP Al.KeywordsAl–Fe alloyMechanical propertiesElectrical conductivityElectric vehiclePermanent casting
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