The effect of Mg addition on microstructure and tensile and stress rupture properties of a P/M Al-Fe-Ce alloy

Dispersion-strengthened aluminum alloys based on Al-TM (TM = transition metal) type systems are being developed for elevated temperature structural applications in aerospace at temperatures up to 623 K as possible substitutes for the more expensive and refractory Ti alloys currently used. Al-Fe-Ce alloys belong to a class of dispersion-strengthened aluminum alloys which are strengthened primarily by ternary Al-Fe-Ce precipitates. Further strengthening of the alloy may be possible by addition of elements such as Mg which impart solid solution strengthening. This should also result in enhancement in elevated temperature strength and stress rupture properties. The aim of this work is to investigate the effect of Mg addition on the microstructure and tensile and stress rupture properties of an Al-Fe-Ce alloy. (AIAA)