In the present study, the resistance to hydrogen embrittlement (HE) of STS 304 austenitic stainless steel was investigated at a wide range of temperature from 25 to − 253 °C. Tensile specimens were thermally precharged with H at 300 °C for 35 days under a H2 gas pressure of 10 MPa. The resistance to HE was reduced with decreasing tensile temperature from 25 to − 50 °C, and then increased again with decreasing deformation temperature further. Finally, HE disappeared at temperatures below − 150 °C. This temperature dependency of HE in thermally H-precharged specimens was almost the same as that in the specimens deformed in a H2 gaseous environment. The occurrence of HE at the temperature range of 25 to − 50 °C was attributed to both strain-induced martensitic transformation (SIMT) and H diffusion into stress-concentrated regions. The absence of HE at temperatures below − 150 °C was due to the sluggish H diffusion, despite of active SIMT. Graphical Abstract: [Figure not available: see fulltext.]
|Number of pages||12|
|Journal||Metals and Materials International|
|Publication status||Published - 2023 Feb|
Bibliographical noteFunding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. 20203030040020).
© 2022, The Author(s) under exclusive licence to The Korean Institute of Metals and Materials.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry