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An integrated approach to the modelling of hydrogen assisted failure in 316L steel

Authors
Journal
Fusion Engineering and Design
0920-3796
Publisher
Elsevier
Publication Date
Volume
41
Identifiers
DOI: 10.1016/s0920-3796(98)00132-x

Abstract

Abstract An integrated approach to the modelling of hydrogen assisted failure in 316L steel is presented. The approach includes experimental, fractographic, numerical and theoretical analysis of the phenomenon. The physical adequacy of the mechanical models of hydrogen embrittlement (notch extension model and notch cracking model) is discussed by comparing the virtual damage depth (theoretical) predicted by the models with the embrittled zone (microphysical) measured in the fractographic analysis by scanning electron microscopy. In addition, a numerical modelling of hydrogen diffusion is performed, concluding that bulk diffusion is not important in hydrogen embrittlement of 316L steel, so that hydrogen transport accelerated by the microdamage itself should be taken into account.

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