| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials for Sustainable Hydrogen Energy
|
| Presentation Title |
Investigation of Hydrogen Embrittlement Effect Using Ex-situ Impact and In-situ Slow Rate Charpy Tests on an X65 Steel and Weld |
| Author(s) |
Xin Pang, Su Xu, Daichi Izumi, Nobuyuki Ishikawa |
| On-Site Speaker (Planned) |
Xin Pang |
| Abstract Scope |
The HE effects on notch toughness properties of an X65 pipeline steel (BM) and seam weld (WM) have been investigated using Charpy impact tests with ex-situ hydrogen pre-charging, and slow-rate three-point bend tests with in-situ hydrogen charging. Hydrogen was introduced into the steel using an electrochemical charging method and the total hydrogen content was estimated using LECO analysis. Although the HE effect on ex-situ Charpy impact toughness was small or negligible, the in-situ slow-rate tests showed significant HE, which increased with decreasing loading rate. The BM had higher toughness but greater HE susceptibility at slow loading rate than the WM for the X65 pipe. The results demonstrated that (i) the Charpy test is ineffective for qualifying HE of steels and welds, and (ii) the three-point bend test at a slow deformation rate with in-situ hydrogen charging is an effective method to examine the hydrogen effects on the fracture properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, Mechanical Properties |