About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing for Energy Applications V
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Presentation Title |
Investigation into the Effect of Recrystallization and Microstructure Control on the Properties of GammaPrint™-1100, a High-γ’ crack-resistant Ni-base Superalloy for 3D-printed Parts in Gas Turbines |
Author(s) |
Ning Zhou, Stephane A.J. Forsik, Austin D Dicus, Tao Wang, Gian A Colombo, QQ Ren, Jonathan D Poplawsky, Mario E Epler |
On-Site Speaker (Planned) |
Ning Zhou |
Abstract Scope |
GammaPrint™-1100 is a new crack-resistant high-γ’ superalloy developed by Carpenter Technology for 3D-printed parts in gas turbines. In the fully heat-treated condition, the alloy generates 1100 MPa Ys at 760 °C with a hot ductility in excess of 5 El%, and a stress rupture life of 100 hours at 207 MPa and 871 °C. These performances were achieved through composition tuning for grain boundary strengthening and γ/γ’ partition coefficient optimization, as well as grain size control during recrystallization.
SEM, EBSD and atom-probe tomography techniques were used to characterize the microstructure with a focus on grain boundary carbides, recrystallization and grain size, and their effect on strength and ductility. The stress rupture properties are interpreted in terms of slow-diffusing element partitioning between the γ channels and the γ’ precipitates. The effect of the post processing heat treatment on the microstructure and mechanical properties is also reviewed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |