| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
L-63: Crack Propagation Behavior of Fex(CoCrMnNi)100-x Multi-component Alloys |
| Author(s) |
Hyunwoo Seo, Hoodahm Lee, Yubeen Hong, Junggeun Park, Hyokyung Sung |
| On-Site Speaker (Planned) |
Hyokyung Sung |
| Abstract Scope |
We have analyzed the crack growth behavior in a plane stress condition of the Fex(CoCrMnNi)100-x high entropy alloy at room and cryogenic temperatures. Twinning is dominant at room temperature while ε-martensite is formed together with twins at cryogenic temperature. Parallelly located twin boundaries and ε-martensite are not effective to resist the crack growth due to crack propagation along twin boundaries, while tiny α′-martensite can hinder the crack propagation leading to increase in resistance to crack growth. At cryogenic temperature, crack blunting is occurred by a large amount of pre-transformed α′-martensite prohibiting the further crack propagation. The compressive stress in front of crack tip by the formation of α′-martensite is also helpful to enhance the crack blunting. This result is contrary to the trend in which α′-martensite is harmful to crack growth resistance. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Sustainability |