Effect of Ni content on the properties and hot cracking susceptibility of Al–Fe–Mg–Zn–xNi alloys for high conductivity demanding applications

Abstract

Because conventional Al-Si-based casting alloys are not suitable for high conductivity demanding parts, such as light-emitting diode lamp heat sink, the need for new high-conductivity aluminium alloys containing no Si became obvious. In this study, various properties of high conductivity Al-0·5Fe-0·5Mg-0·5Zn-xNi alloys were investigated. Ni additions appeared to enhance the tensile strength and corrosion potential of the alloys. Furthermore, hot cracking susceptibility of the alloys was also observed to increase with the increase in the Ni content.