| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Comparison of Fracture Morphologies and Hydrogen States Present in Vicinity of Fracture Surface Obtained by Different Methods of Evaluating Hydrogen Embrittlement of DP and TRIP Steels |
| Author(s) |
Daichi Asari, Kenichi Takai, Satoshi Mizokami, Mitsugi Fukahori |
| On-Site Speaker (Planned) |
Daichi Asari |
| Abstract Scope |
Fracture morphologies and hydrogen states present in vicinity of fracture surface for DP and TRIP steels have been investigated. The fracture surfaces were obtained by SSRT at strain rates of 8.33×10-6 s-1, 1.66×10-6 s-1 and CLT under the same hydrogen charging condition. Fracture surfaces were observed using SEM. Hydrogen states present in the vicinity of fracture surface were analyzed using a thermal desorption analysis immediately after the specimens were fractured. Results showed that the critical fracture strengths were in the order of [SSRT(8.33×10-6 s-1)">" CLT">" SSRT(1.66×10-6 s-1)] for both specimens. DP specimen fractured by SSRT at higher strain rate had only lower-temperature peak from hydrogen desorption profile, however, the ones fractured by SSRT at lower strain rate and by CLT had both lower-temperature peak and higher-temperature peak. Furthermore, the fracture surfaces changed from intergranular to quasi-cleavage fracture corresponding to the decrease in fracture strength from both specimens. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |