| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
A study on the tensile behavior of fcc ferrous alloy accompanied by cryogenic serrations at 4.2 K |
| Author(s) |
Seon-Keun Oh, Jun-Ho Lee, Ka-Ram Lim, Young-Kyun Kim, Young-Sang Na |
| On-Site Speaker (Planned) |
Seon-Keun Oh |
| Abstract Scope |
In accordance with the development of state-of-the-art industries associated with cryogenics, many researchers have intensively studied fcc structure-based alloys, such as austenitic stainless steels and high entropy alloys, for the cryogenic applications. However, at extremely low temperature below ~15 K, these alloys tend to show the serrations in their tensile curves, accompanied by the onset of shear bands on their tensile specimens. To explain these serrations, two different models have been proposed: the mechanical instability model based on the change in dislocation component and the thermomechanical instability model based on the extremely low thermal properties. Such steels and alloys show extremely low thermal properties at cryogenic temperatures. Therefore, this study aims to elucidate the mechanism of cryogenic serrations of fcc ferrous alloy with extremely low thermal properties, and to comprehend the tensile behavior at extremely low temperatures, accompanied by the cryogenic serrations, based on the dislocation dynamics and thermal properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Other |