Temperature Dependency of Hydrogen Embrittlement in Thermally H-precharged STS 304 Austenitic Stainless Steel

Hanna Yang, Thanh Tuan Nguyen, Jaeyeong Park, Hyeong Min Heo, Junghoon Lee, Un Bong Baek, Young Kook Lee

Research output: Contribution to journalArticlepeer-review

Abstract

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.]

Original languageEnglish
JournalMetals and Materials International
DOIs
Publication statusAccepted/In press - 2022

Bibliographical note

Funding 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).

Publisher Copyright:
© 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

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