P M SUPERALLOYS - A CURRENT PERSPECTIVE

The current usage of P/M superalloys is compared with the 1995 forecas t. Recent developments are evaluated including advances in spray-formi ng, sub-solidus HIPing, alloy development, work on the high speed civi l transport (HSCT), and probabilistic fracture mechanics. Replacement of ingot metallurgy 706 by a P/M version in land based gas turbines is also assessed. The future use and growth of the P/M superalloy market is still largely in aircraft gas turbines and heavily dependent on th e increased production of the Boeing 777.