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Finite-element modeling of stress-assisted hydrogen diffusion in 316L stainless steel

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Abstract

We present a numerical investigation of stress-assisted hydrogen diffusion in AISI 316L stainless steel by means of a diffusion software assembled to a finite-element elastoplastic code. Notched cylindrical bars with different radii of the notches are simulated and the effect of the stress field on the process of hydrogen transport is analyzed. The numerical results show that, regardless of the stress field, hydrogen penetration depths always remain smaller than 0.1 mm for simulated durations of the tests of about two months. If the effect of hydrogen damage is represented by a crack originating from the root of the notch, then we observe a decrease in the load-bearing capacity of the bars, although the contours of hydrogen concentration are remarkably similar to those found in bars without cracks.

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Authors
  1. R. Cortés
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  2. A. Valiente
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  3. J. Ruiz
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  4. L. Caballero
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  5. J. Toribio
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Additional information

Departamento de Ingenieria, Universidad Carlos III de Madrid; Escuela Politécnica Superior; Departamento de Ciencia de Materiales Escuela de Ingenieros de Caminos, Universidad Politécnica de Madrid; Departamento de Ciencia de Materiales, Universidad de la Coruña, Spain. Published in Fizyko-Khimichna Mekhanika Materialiv, Vol. 33, No. 4, pp. 87–96, July–August, 1997.

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Cortés, R., Valiente, A., Ruiz, J. et al. Finite-element modeling of stress-assisted hydrogen diffusion in 316L stainless steel. Mater Sci 33, 491–503 (1997). https://doi.org/10.1007/BF02537546

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  • DOI: https://doi.org/10.1007/BF02537546

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