| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels V
|
| Presentation Title |
Methods for Improving the Hydrogen Embrittlement Resistance in Press-hardened Steel |
| Author(s) |
Zuoheng Cao, Xiaochuan Xiong, MingXin Huang |
| On-Site Speaker (Planned) |
MingXin Huang |
| Abstract Scope |
Hydrogen embrittlement in high strength pressed-hardened steel (PHS) is a serious issue in the automotive industry. In particular, PHS with a tensile strength of 2 GPa is very sensitive to the defects in the microstructure. The present work shows that non-metallic inclusions such as oxides are the origin of hydrogen embrittlement during the slow strain rate test (SSRT) after electrochemically hydrogen charging. The typical fracture surface shows a fish-eye feature, similar to the fatigue failure in high strength steel. It indicates that the size and volume fraction of the non-metallic inclusions play a crucial role in determining the hydrogen embrittlement of PHS. It is recommended that ultra-clean steel manufacturing practice, similar to the one used for high-performance bearing steel, should be adopted for 2 GPa PHS for improvement of the hydrogen embrittlement resistance. |
| Proceedings Inclusion? |
Planned: |