| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Enhanced creep resistance influenced by lattice strain fields and grain boundary sliding of Mo-doped ferritic medium entropy superalloys |
| Author(s) |
Sang-Hun Shim, Kanghyun Park, Heoun-Jun Kwon, Young-Kyun Kim, Young-Sang Na, Gian Song, Hye Jung Chang, Ka Ram Lim |
| On-Site Speaker (Planned) |
Sang-Hun Shim |
| Abstract Scope |
Precipitation hardening has considered as a one of the most important factor controlling mechanical strengthening. Typically, the long-range L12-ordered face centered cubic (fcc) precipitates in A1-disordered fcc matrix highly utilized in Ni-base superalloys for high temperature application due to coherent interface induced decrease of dislocation motion, and their prolonged phase stability. Recently, the novel alloy design concept of high/medium-entropy alloys (H/MEAs) have attracted by promising physical properties, which enabled to understand the phase stability of previously undiscovered alloys or phases. In view of this, the series of L21-strengthened Al-Cr-Fe-Ni-Ti ferritic medium entropy superalloys are newly designed for optimum balance in terms of cost and property at mild hot temperature, and they have a great potential for small modular reactors (SMRs). Here, we systematically investigated the effect of Mo addition in Al-Cr-Fe-Ni-Ti-(Mo) alloys on the high temperature stability and creep resistance by means of comprehensive analyses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Iron and Steel |