| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Consequences of Micro-alloying Elements and Microstructure on the Hydrogen Embrittlement Sensitivity of Carbon Steels |
| Author(s) |
Alexia D'Orazio, Abdelali Oudriss, Patrick Girault, Jamaa Bouhattate, Cyril Berziou, Guillaume Lotte, Stéphane Cohendoz, Lucie Leclair, Bernard Resiak, Bruno Cofino, Xavier Feaugas |
| On-Site Speaker (Planned) |
Alexia D'Orazio |
| Abstract Scope |
The objective is to evaluate the influence of micro-alloying elements (Nb, Ti, B) and especially their precipitates on the hydrogen embrittlement sensitivity for two microstructures: tempered martensite and bainite. For this purpose, they were characterized with particular attention to cementite and other precipitates (composition, size, coherency…). The concentration of carbon remaining in solid solution was also evaluated because the first results showed an influence of carbon in solid solution on the state of hydrogen (diffusible and/or trapped) for both microstructures, which resulted in different HE sensibilities. Those microstructural results are correlated with the diffusion and trapping of hydrogen investigated by cathodic polarization, thermal desorption, and permeation tests. Finally, the impact of hydrogen on mechanical properties was studied with tensile tests at different strain rates (range between 10-3 and 10-6 s-1). Different behaviors depending on the microstructures, composition, and strain rates will be discussed in relation with hydrogen embrittlement mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, Mechanical Properties |