About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design Approaches and Experiences V
|
Presentation Title |
Design of Cobalt Base Single Crystal Superalloys |
Author(s) |
Sean P. Murray, Colin A Stewart, Robert K. Rhein, Carlos G. Levi, Anton Van der Ven, Tresa M. Pollock |
On-Site Speaker (Planned) |
Tresa M. Pollock |
Abstract Scope |
Alloy design studies of single crystal Co-base superalloys strengthened with L12 precipitates have resulted in a suite of alloys with excellent high temperature creep strength. However, the engineering application of these alloys will require a balanced suite of properties. The status of computational and experimental design tools that have guided development toward this balance will be discussed. Early in the design process, density functional theory provided critical guidance for narrowing the compositional space. While Calphad-type databases provide critical information needed to assess solidification and phase equilibria, their development has been comparatively slower. Given the sparse information available in this compositional domain, combinatorial experiments have been effective for identifying compositions that achieve a balance of properties, including oxidation. Gaps in the alloy design infrastructure will be discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |