| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Creep Properties of Advanced Structural Materials
|
| Presentation Title |
F-1: A Study on Microstructure and Mechanical Properties of Fe-Cr-Ni-Al-V Alloys |
| Author(s) |
Kanghyun Park, Ho-seop Song, Jeongeun Kim, Ka Ram Lim, Chanho Lee, Gian Song |
| On-Site Speaker (Planned) |
Kanghyun Park |
| Abstract Scope |
There have been many efforts to improve creep-resistance of ferritic materials. Fe-Cr-Ni-Al alloys reinforced by coherent B2-NiAl precipitates show nearly zero lattice misfit between B2-NiAl precipitates and Fe matrix, which can improve the microstructural stability. Recently, new strategies to increase the creep-resistance have been reported, such as addition of Titanium into Fe-Cr-Ni-Al alloy, which forms hierarchical precipitate B2-NiAl/L21-Ni2TiAl. In this study, our objective is to enhance the mechanical properties at high temperatures by adding vanadium into Fe-Cr-Ni-Al alloy. Vanadium was employed to adjust the microstructures, such as size of coherent B2-NiAl precipitates. The microstructures, mechanical properties and strengthening mechanisms at 973K were examined using Transmission-electron-microscopy, X-ray diffraction, and theoretical calculation. It was found that the vanadium results in the reduction of lattice misfit between matrix and precipitates. Furthermore, hierarchical structure in the precipitate was established in V-containing alloys, which plays a crucial role in enhancing the yield strength at 973K. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, |