AD 730(TM), a New Cast & Wrought Superalloy for High Temperature Disk Applications

The enhancement of efficiency in gas turbine engines requires the development of new superalloys capable of withstanding higher temperatures. The development of new industrial cast and wrought (C&W) disk alloys with required combination of strength, creep and fatigue properties at 700°C is highly desired due to the expensive cost of powder metallurgy.
AD730(TM), which is the newly nickel base superalloys developed by Aubert & Duval, was therefore designed to offer a better combination between high temperature properties at 700°C and cost compared to other C&W superalloys.
The new nickel base AD730(TM) superalloy was designed to improve the combination between high temperature properties and cost with these following features:
- Mechanical properties close to Udimet720(TM) and significantly higher than 718Plus(TM), Waspaloy(TM) and 718.
- Cost lower than Udimet720(TM)
- Workability and ability for C&W process better than Udimet720(TM)
- A high microstructural stability up to 750°C