About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Seeing is Believing -- Understanding Environmental Degradation and Mechanical Response Using Advanced Characterization Techniques: An SMD Symposium in Honor of Ian M. Robertson
|
Presentation Title |
NOW ON-DEMAND ONLY - Effect of Hydrogen on Creep Properties |
Author(s) |
Masanobu Kubota, Daisuke Takazaki, Ryosuke Komoda, Kentrao Wada, Toshihiro Tsuchiyama, Mohsen Dadfarnia, Brian P Somerday, Petros Sofronis |
On-Site Speaker (Planned) |
Masanobu Kubota |
Abstract Scope |
It is expected that high-temperature hydrogen technologies such as solid oxide fuel cell and high-temperature water electrolysis will take important role in hydrogen society. Regarding the degradation of structural materials in high-temperature hydrogen, high-temperature hydrogen attack is most prominent manifestation. However, studies on other types of failure are quite limited. In this study, a creep test of SUS304 austenitic stainless steel was carried out in hydrogen at 873K. The creep rate at the secondary creep region in hydrogen was significantly accelerated. It resulted significant reduction in the creep life. In argon, the fracture surface changed from dimple to intergranular cracking with the increase in creep life. In hydrogen, this change was delayed. Regarding the mechanism, it was confirmed that decarburization, carbide formation and HELP were minor in this experiment. Instead, enhanced dislocation climb mediated by increased vacancy density is a plausible mechanism, although further investigation is needed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Iron and Steel, Other |