A NEW, 3RD-GENERATION, SINGLE-CRYSTAL, CASTING SUPERALLOY

The CMSX(R)-10 alloy is a third-generation, single-crystal (SX), nicke l-based casting alloy that is characterized by its 6 wt.% rhenium cont ent, relatively high refractory element level (W + Ta + Re + Mo), and low level of chromium employment. Based on published data, the alloy's high-temperature creep-rupture resistance is greater than all other n ickel-based alloys (approximately 30-degrees-C better than CMSX-4 and PWA 1484). Moreover, the alloy's composition is balanced to provide an attractive blend of SX component castability, heat treatability, impa ct strength, fatigue strength, and resistance to environmental degrada tion. Most notably, the alloy provides extremely good bare hot corrosi on resistance, despite its novel and relatively low (2-3 wt.%) chromiu m content.