Possibility of Enhancement of the High-Temperature Strength and the Heat Resistance of a Nickel Aluminlde-Based Structural Intermetallic Alloy

摘要

The assimilation of a number of rare-earth metals (REM = praseodymium, neodymium, erbium) in a cast liigh-temperature nickel aluminide-based intermetallic alloy and the effect of REM alloying of the alloy on the critical temperatures, the high-temperature strength, and the heat resistance (time to failure) of the structural alloy are studied. It is shown that the heat resistance and the time to failure of the alloy at 1200°C can be increased by microalloying of the intermetallic alloy with REM.