Development of a New Low-Cost Polycrystalline Nickel-Base Superalloy

There is significant industrial demand for low-cost polycrystalline Ni-base superalloysPolycrystalline Ni-base superalloys that can be utilised for rotating and static applications at intermediate temperatures in aircraft engines. In this work, we report on the microstructureMicrostructure, heat treatmentHeat treatment response, mechanical propertiesMechanical properties and oxidationOxidation behaviour of a newly developed alloy for these applications. The alloy has been designed to improve on the thermal stability and mechanical performance of Inconel718 (IN718), whilst offering lower processingProcessing costs than advanced cast & wroughtWrought alloys such as Alloy 720Li and Renè 65. The study highlights key areas of alloy developmentAlloy development, comparing the alloy properties where possible to current commercially available alternatives.