|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||The Extent of Individual Strengthening Mechanisms in Model Quinary Nickel-based Superalloys
||Amy Jane Goodfellow, Katerina A Christofidou, Enrique I Galindo-Nava, Nick G Jones, Chad D Boyer, Mark Hardy, Howard J Stone
|On-Site Speaker (Planned)
||Amy Jane Goodfellow
Polycrystalline nickel based superalloys are currently used for rotor discs in gas turbine engines due to their excellent high temperature strength, derived from ordered γʹ precipitates within the γ matrix. These precipitates strengthen the alloy via numerous methods, in addition to grain boundary and solid solution strengthening of the matrix phase. Models exist for predicting alloy strength, although different implementations use different combinations of the strengthening mechanisms. In this study, a series of model alloys with varying lattice misfit has been investigated. The extent of individual strengthening mechanisms has been predicted using microstructural data, and compared to experimental mechanical properties. It is found that solid solution strengthening of the γʹ phase plays a significant role in yield strength and should not be neglected in predictions of alloy strength.
This work was supported by Rolls-Royce plc and the EPSRC (EP/H022309/1 and EP/H500375/1).
||Planned: Supplemental Proceedings volume