About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials for High Temperature Applications: Next Generation Superalloys and Beyond
|
Presentation Title |
Understanding the Effects of Alloy Chemistry and Microstructure on the Stress Relaxation Behavior of High Strength Ni-base Superalloys |
Author(s) |
Sammy Tin |
On-Site Speaker (Planned) |
Sammy Tin |
Abstract Scope |
Recent advances in processing and a better understanding of composition – property relationships have led to the development of innovative high strength, creep resistant Ni-based superalloys used for disk rotor components. Many of these alloys utilize a higher volume fraction of γ′ precipitates along with a more potent level of solid solution strengthening to achieve these improved properties. Although the strength and temperature capability of powder processed Ni-base superalloys have been significantly improved, these materials are also known to be more difficult to manufacture and are more sensitive to stress concentration features, such as notches and other defects. Controlling the formation of residual stresses during processing and understanding the characteristic stress relaxation behavior of the material has become increasingly important for the design and implementation of new alloys. In this investigation, the results of stress relaxation testing from various high strength powder processed Ni-base superalloys with varying initial microstructures will be presented. The role of chemistry and microstructure on the characteristic stress relaxation response of the alloy will be discussed. |
Proceedings Inclusion? |
Planned: |