About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
Cyclic- and Dwell-fatigue Crack Growth Behavior in a Phase Transformation Strengthened Disk Superalloy |
Author(s) |
Christopher Kantzos, Timothy Smith, Jack Telesman, Ian Dempster, Timothy Gabb |
On-Site Speaker (Planned) |
Christopher Kantzos |
Abstract Scope |
A follow-on study was performed on NASA’s recently developed Nickel-based P/M TSNA-1 disk alloy to evaluate the influence of processing on the alloy’s mechanical properties. The composition of the alloy was tailored to improve the high temperature creep strength through transformation strengthening of precipitate phases. Initial alloy development was done utilizing HIP processing. The follow-on study evaluated the properties of the forged version of the alloy which provided for a more realistic processing history similar to that utilized in the engine industry. The creep performance of the forged material significantly exceeded the original HIP material, and outperformed alloys like LSHR and ME3 by an order of magnitude. The TSNA-1 alloy’s cyclic and dwell FCG behavior was also characterized. While the HIP condition the alloy exhibited very poor dwell FCG resistance in comparison to the LSHR P/M disk alloy, the forging processed TSNA-1 drastically improved the crack growth behavior. In the forged condition both cyclic and dwell FCG behavior of the alloy were equivalent to a current LSHR P/M alloy. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |