| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Sustainability of High Temperature Alloys
|
| Presentation Title |
Effects of residual Ca content on the mechanical response of a new polycrystalline Ni-base superalloy |
| Author(s) |
George J. Wise, Hon Tong Pang, Mark C. Hardy, Nicholas G. Jones, Howard J. Stone |
| On-Site Speaker (Planned) |
George J. Wise |
| Abstract Scope |
Polycrystalline superalloys have undergone significant compositional development to improve their performance, utilising elevated levels of precipitate forming elements and refractory metals. Hence, there is significant industrial demand to use revert to increase the stability of material supply, reduce the consumption of scarce elements and lower production costs. To achieve this, residual element accumulation must be understood, namely Ca, which is routinely added to desulphurise and deoxidise the melt. Historically, elevated levels have been linked to compromised hot ductility and mechanical properties in cast & wrought alloys. However, in modern powder metallurgy alloys with improved melt cleanliness, even lower concentrations may have a pronounced effect. This work reports on the effects of Ca on mechanical properties through a combination of isothermal compression testing and microstructural analyses on a series of specimens with systematically varying Ca concentration. These results will inform melt practice and increase the use of revert in future production. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Other, Recycling and Secondary Recovery |