Aluminum-based alloy having improved mechanical strength in ageing at high temperatures and adapted to rapid solidification
The invention relates to an aluminum alloy includes, in mass percentages 3 to 6% titanium, 1.5 to 3% manganese, 1 to 2% iron, 1 to 2% chromium, 0.5 to 1.5% vanadium, 0.5 to 1.5% nickel, 0.2 to 1% zirconium, 0 to 0.5% cerium, 0 to 0.5% lanthanum, the remainder being aluminum and unavoidable impurities.
1. An aluminum alloy comprising, in mass percentages:
3 to 6% titanium,
1.5 to 3% manganese
1 to 2% iron,
1 to 2% chromium,
0.5 to 1.5% vanadium,
0.5 to 1.5% nickel,
0.2 to 1% zirconium,
0 to 0.5% cerium,
0 to 0.5% lanthanum,
the remainder consisting of aluminum and unavoidable impurities.
2. The alloy as claimed in claim 1 comprising, in mass percentages, 4 to 6% titanium.
3. The alloy as claimed in claim 1 comprising, in mass percentages, 2.1 to 2.6% manganese.
4. The alloy as claimed in claim 1 comprising, in mass percentages, 1.3 to 1.7% chromium.
5. The alloy as claimed in claim 1 comprising, in mass percentages, 1.2 to 1.6% iron.
6. The alloy as claimed in claim 1 comprising, in mass percentages, 0.75 to 1.15% vanadium.
7. The alloy as claimed in claim 1 comprising, in mass percentages, 0.8 to 1.1% nickel.
8. The alloy as claimed in claim 1 comprising, in mass percentages, 0.45 to 0.75% zirconium.
9. The alloy as claimed in claim 1 comprising, in mass percentages, 0.05 to 0.35% cerium.
10. The alloy as claimed in claim 1 comprising, in mass percentages, 0 to 0.2% lanthanum.
11. The alloy as claimed in claim 1 , comprising, in mass percentages:
5.00% titanium,
2.34% manganese,
1.40% iron,
1.50% chromium,
0.95% vanadium,
0.95% nickel,
0.60% zirconium,
0.20% cerium,
0.10% lanthanum,
the remainder consisting of aluminum and unavoidable impurities.
12. A turbomachine part made of an aluminum alloy as claimed in claim 1 .
13. A process for manufacturing a turbomachine part made of an aluminum alloy as claimed in claim 1 , comprising a step of solidifying the alloy in which the alloy passes from the liquid state to the solid state with a cooling rate greater than or equal to 105° C./s.
14. The process as claimed in claim 13 , wherein the part is made by additive manufacturing by laser melting a powder of the alloy.
15. The process as claimed in claim 13 , comprising the following steps:
manufacturing a powder from the alloy obtained in the solidification step;
sintering the powder thus produced to obtain the part.