| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-58: Hot Deformation Behavior and Microstructure Evolution in XH43 Superalloys |
| Author(s) |
Sagar Anandrao Patil, S.V.S. Narayana Murty, M.J.N.V. Prasad |
| On-Site Speaker (Planned) |
Sagar Anandrao Patil |
| Abstract Scope |
Polycrystalline superalloys are considered to be cost-effective for high-temperature applications requiring good creep resistance along with retention of strength at high temperatures. Conventionally, they are manufactured by hot forging, followed by solution annealing and double aging. The processing parameters such as strain, strain rate, and temperature affect the deformation behavior. To understand the forgeability of XH43 superalloy, a variant of IN718, the hot deformation behavior of this alloy was studied by isothermal compression testing at different temperatures under varying strain rates using a thermo-mechanical simulator. Electron backscattered diffraction (EBSD) study of the deformed specimens revealed that discontinuous dynamic recrystallization (DDRX) is the dominant softening mechanism. A higher fraction of DRX grains is attributed to enhanced grain boundary migration at lower strain rates and higher strain rates to higher stored energy. A low volume fraction of DRX grains observed at an intermediate strain rate corresponds to sluggish recrystallization in such conditions. |