| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Corrosion in Heavy Liquid Metals for Energy Systems
|
| Presentation Title |
Liquid Metal Embrittlement of Al-containing High-entropy Alloys Exposed to Lead-bismuth Eutectic |
| Author(s) |
Xing Gong |
| On-Site Speaker (Planned) |
Xing Gong |
| Abstract Scope |
The liquid metal embrittlement (LME) susceptibility of two Al-containing high entropy alloys (HEAs), i.e. fcc Al0.4CoCrFeNi and fcc+bcc Al0.7CoCrFeNi (at%), exposed to oxygen-enriched LBE at 350 and 500℃ was tested using slow strain rate tensile tests. The reference tests were done in Ar. The results show that the Al0.4CoCrFeNi alloy is not susceptible to embrittlement, while the Al0.7CoCrFeNi alloy is severely embrittled by LBE at both temperatures. The post-test microstructural examinations reveal that the LME cracks propagate either in the bcc phase or along the bcc/fcc phase boundaries. The phase boundary cracking becomes more prevailing at 500°C than at 350°C, likely resulting from enhanced grain boundary wetting or diffusion. It can be concluded, therefore, that the fcc phase is not susceptible to LME, while the bcc phase can be embrittled, and especially the bcc/fcc phase boundaries are weak points to be attacked by LBE at elevated temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Environmental Effects, Mechanical Properties |