A Fracture Strain Based Numerical Prediction Method For Hydrogen Effect on Fracture Toughness & nbsp;
- Authors
- Youn, Gyo-Geun; Kim, Yun-Jae; Kim, Jong-Sung; Lam, Poh-Sang
- Issue Date
- 15-7월-2021
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- hydrogen-embrittlement effect; fracture toughness; finite element damage analysis
- Citation
- INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, v.202
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
- Volume
- 202
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/127711
- DOI
- 10.1016/j.ijmecsci.2021.106492
- ISSN
- 0020-7403
- Abstract
- In this paper, a finite element (FE) simulation method based on the multi-axial fracture strain model is proposed to predict the effect of hydrogen embrittlement on fracture toughness and is applied to test data on conventionally forged (CF) 21-6-9 stainless steel. For the uncharged material, the damage model parameters are determined from the tensile and fracture toughness test results. A hydrogen-embrittlement constant is introduced to modify the multi-axial fracture strain for hydrogen-charged materials. The predicted fracture toughness results using the modified multi-axial fracture strain agree closely with the experimental data of CF 21-6-9 stainless steel precharged at two different hydrogen concentrations, 78 and 210 wppm.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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