|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||Nickel-based Superalloys Reinforced by Gamma Prime and Gamma Double Prime Precipitates
||Howard Stone, Paul M Mignanelli, Nicholas G Jones, Ed J Pickering, Olivier MDM MessÚ, Catherine MF Rae, Mark C Hardy
|On-Site Speaker (Planned)
A new, high niobium, nickel based superalloy has been identified that can be heat-treated to produce a microstructure comprising appreciable volume fractions of both gamma prime and gamma double prime precipitates. Studies of the microstructural evolution of this alloy during thermal exposure of up to 1000 hours at temperatures between 600 and 900 ˚C have shown that it offers a 100 ˚C increase in thermal stability over existing gamma double prime reinforced alloys. Tensile testing at temperatures between ambient and 800 ˚C also indicate that it possesses exceptional tensile strength, in excess of 200 MPa greater than that of IN718 across this temperature range. The properties and prospects of this new alloy will be discussed. The authors would like to acknowledge the EPSRC/Rolls-Royce Strategic Partnership for funding (EP/M005607/1 and EP/H022309/1).