The effect of Mg addition on microstructure and tensile and stress rupture properties of a P/M Al-Fe-Ce alloy
- Defence Metallurgical Research Lab., Hyderabad (India)
Dispersion strengthened Aluminium alloys based on Al-TM (TM = transition metal) type systems are being developed for elevated temperature structural applications in aerospace at temperatures up to 623K as possible substitutes for the more expensive and refractory Ti alloys currently used. Alloy systems containing transition metals such as Fe, Ni, V, Cr, Zr, Mo and Ti with possible additions of Si and Ce (or misch metal) have been investigated. Al-Fe-Ce alloys belong to this class of dispersion strengthened aluminium alloys which are strengthened primarily by ternary Al-Fe-Ce precipitates. The matrix in this case is almost pure aluminium. Further strengthening of the alloy may therefore 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. It is reported that the addition of Mg to Al-Fe-Mm (Mm = misch metal) alloy does not result in formation of new phases in melt spun ribbons even after annealing at 773K thereby confirming that Mg is retained in solid solution. The aim of the present work is to investigate the effect of Mg addition on the microstructure and tensile and stress rupture properties of an Al-Fe-Ce alloy.
- OSTI ID:
- 665226
- Journal Information:
- Scripta Materialia, Vol. 39, Issue 7; Other Information: PBD: 4 Sep 1998
- Country of Publication:
- United States
- Language:
- English
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