|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||The Effect of Molybdenum on the Microstructure and Properties of Model Quinary Nickel-based Superalloys
||Amy Jane Goodfellow, Enrique Galindo-Nava, Nick Jones, Mark Hardy, Howard Stone
|On-Site Speaker (Planned)
||Amy Jane Goodfellow
The efficient design of new nickel based superalloys to meet the service needs of future gas turbine engine components requires accurate descriptions of the factors that influence alloy properties. In the case of alloy strength, models exist that relate the relative contributions of grain size, solid-solution strengthening and precipitate hardening to alloy composition and microstructural parameters. However, given the complexity of commercial nickel-based superalloys, assessing the efficacy of these models can be challenging. In this study, a series of model quinary alloys has been investigated, with varying molybdenum content and thereby lattice misfit that changes from positive to negative across the series. Detailed characterisation of these alloys’ phase compositions and precipitate size distributions has enabled predictions to be made of their mechanical properties and these have been critically compared with those measured experimentally. This work was supported by Rolls-Royce plc and the EPSRC under EP/H022309/1 and EP/H500375/1.