| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Sustainability of High Temperature Alloys
|
| Presentation Title |
Enhancement of crack propagation resistance by healing treatment in boron containing FeNi-base superalloy |
| Author(s) |
Cham Il Kim, Ji Yeong Lee, Won Tae Kim, Eun Soo Park, Do-Hyang Kim |
| On-Site Speaker (Planned) |
Do-Hyang Kim |
| Abstract Scope |
The objective of the present study was to investigate whether the crack propagation resistance of boron-containing FeNi-based superalloy could be enhanced by healing treatment. The healing treatment was performed by pre-straining and subsequent heat treatment, resulting in a pronounced boron segregation zone at the interface. Formation of boron segregation zone reinforced the crack propagation path, thereby effectively enhancing the mechanical properties of FeNi-based superalloy. After pre-straining and healing heat treatment, eta phase formed at the grain boundary, leading to the formation of a boron segregation zone at the interface between the eta phase and gamma matrix. Both strength and ductility were improved with increasing boron content from 0 at% to 0.2 at% after healing treatment. The segregation of boron at the precipitate-matrix interface played a role in enhancing both strength and ductility. Moreover, the present study shows that a critical amount of boron is required for interface strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Phase Transformations, Mechanical Properties |