On modeling hydrogen-induced crack propagation under sustained load

Mohsen Dadfarnia, Brian P. Somerday, Philip E. Schembri, Petros Athanasios Sofronis, James W. Foulk, Kevin A. Nibur, Dorian K. Balch

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The failure of hydrogen containment components is generally associated with subcritical cracking. Understanding subcritical crack growth behavior and its dependence on material and environmental variables can lead to methods for designing structural components in a hydrogen environment and will be beneficial in developing materials resistant to hydrogen embrittlement. In order to identify the issues underlying crack propagation and arrest, we present a model for hydrogen-induced stress-controlled crack propagation under sustained loading. The model is based on the assumptions that (I) hydrogen reduces the material fracture strength and (II) crack propagation takes place when the opening stress over the characteristic distance ahead of a crack tip is greater than the local fracture strength. The model is used in a finite-element simulation of crack propagation coupled with simultaneous hydrogen diffusion in a model material through nodal release. The numerical simulations show that the same physics, i.e., diffusion-controlled crack propagation, can explain the existence of both stages I and II in the velocity versus stress intensity factor (V-K) curve.

Original languageEnglish
Pages (from-to)1390-1398
Number of pages9
JournalJOM
Volume66
Issue number8
DOIs
Publication statusPublished - Jan 1 2014

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Hydrogen
Crack propagation
Fracture toughness
Hydrogen embrittlement
Factor V
Stress intensity factors
Crack tips
Chemical elements
Physics
Computer simulation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Dadfarnia, M., Somerday, B. P., Schembri, P. E., Sofronis, P. A., Foulk, J. W., Nibur, K. A., & Balch, D. K. (2014). On modeling hydrogen-induced crack propagation under sustained load. JOM, 66(8), 1390-1398. https://doi.org/10.1007/s11837-014-1050-8

On modeling hydrogen-induced crack propagation under sustained load. / Dadfarnia, Mohsen; Somerday, Brian P.; Schembri, Philip E.; Sofronis, Petros Athanasios; Foulk, James W.; Nibur, Kevin A.; Balch, Dorian K.

In: JOM, Vol. 66, No. 8, 01.01.2014, p. 1390-1398.

Research output: Contribution to journalArticle

Dadfarnia, M, Somerday, BP, Schembri, PE, Sofronis, PA, Foulk, JW, Nibur, KA & Balch, DK 2014, 'On modeling hydrogen-induced crack propagation under sustained load', JOM, vol. 66, no. 8, pp. 1390-1398. https://doi.org/10.1007/s11837-014-1050-8
Dadfarnia M, Somerday BP, Schembri PE, Sofronis PA, Foulk JW, Nibur KA et al. On modeling hydrogen-induced crack propagation under sustained load. JOM. 2014 Jan 1;66(8):1390-1398. https://doi.org/10.1007/s11837-014-1050-8
Dadfarnia, Mohsen ; Somerday, Brian P. ; Schembri, Philip E. ; Sofronis, Petros Athanasios ; Foulk, James W. ; Nibur, Kevin A. ; Balch, Dorian K. / On modeling hydrogen-induced crack propagation under sustained load. In: JOM. 2014 ; Vol. 66, No. 8. pp. 1390-1398.
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