A Fracture Strain Based Numerical Prediction Method For Hydrogen Effect on Fracture Toughness

Gyo Geun Youn; Yun Jae Kim; Jong Sung Kim; Poh Sang Lam

doi:10.1016/j.ijmecsci.2021.106492

A Fracture Strain Based Numerical Prediction Method For Hydrogen Effect on Fracture Toughness

Gyo Geun Youn, Yun Jae Kim, Jong Sung Kim, Poh Sang Lam

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

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.

Original language	English
Article number	106492
Journal	International Journal of Mechanical Sciences
Volume	202-203
DOIs	https://doi.org/10.1016/j.ijmecsci.2021.106492
Publication status	Published - 2021 Jul 15

Keywords

CF 21-6-9 stainless steel
finite element damage analysis
fracture toughness
hydrogen-embrittlement effect

ASJC Scopus subject areas

Civil and Structural Engineering
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.ijmecsci.2021.106492

Cite this

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title = "A Fracture Strain Based Numerical Prediction Method For Hydrogen Effect on Fracture Toughness",

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.",

keywords = "CF 21-6-9 stainless steel, finite element damage analysis, fracture toughness, hydrogen-embrittlement effect",

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AU - Youn, Gyo Geun

AU - Kim, Yun Jae

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AU - Lam, Poh Sang

PY - 2021/7/15

Y1 - 2021/7/15

N2 - 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.

AB - 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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A Fracture Strain Based Numerical Prediction Method For Hydrogen Effect on Fracture Toughness

Abstract

Keywords

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