Castability, Conductivity, and Strength Trade-off with Al Transition Metal Eutectic Alloys
摘要
The compromise between electrical conductivity and strength of aluminum alloys with additions of iron, nickel, and both iron + nickel was examined. As expected, pure aluminum showed the highest electrical conductivity of 61 %IACS with the lowest ultimate tensile strength (UTS) of ~54 MPa, while higher alloy content aluminum + iron and aluminum + nickel alloys showed electrical conductivities closer to 54–55 %IACS with corresponding UTS ranging from 66 to 117 MPa. However, the aluminum alloys with both iron + nickel had nearly the same electrical conductivity as the other alloys but tended to have higher UTS over 120 MPa. All the alloys examined had similar castability as assessed using a hot tearing susceptibility finger-type mold. Aluminum alloys with transition metal additions offer high electrical conductivity as well as high castability and strength over pure aluminum.