About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Purveyors of Processing Science and ICME: A SMD Symposium to Honor the Many Contributions of Taylan Altan, Wei Tsu Wu, Soo-Ik Oh, and Lee Semiatin
|
Presentation Title |
Annealing Twins in Wrought Polycrystalline Superalloys |
Author(s) |
Marie Charpagne, J.C. Stinville, Will Lenthe, McLean P. Echlin, Tresa M. Pollock |
On-Site Speaker (Planned) |
Tresa M. Pollock |
Abstract Scope |
The properties of wrought polycrystalline superalloys are sensitive to the final structure that develops across the thermomechanical processing path. Fatigue, one of the most critical properties, is influenced by the presence of annealing twins under conditions where extrinsic defects do not dominate cyclic behavior. While annealing twins develop during the final recrystallization and grain growth processes, the details of the mechanisms that result in their formation are still not completely understood. Three-dimensional multimodal datasets collected by TriBeam tomography enable the network structure of twins to be studied. The character of large twin-related domains that form as a result of recrystallization will be discussed, along with the role of precipitates present during subsolvus processing. The important role of the network structure for fatigue crack initiation and propagation will be addressed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |