Abstract

Austenitic stainless steel is used in hydrogen containers. The hydrogen embrittlement has drawn much attention. In this paper, in situ measurement by neutron stress spectrometer and neutron scattering is carried out during quasi‐static tensile tests. Based on the information at the micro‐ and macro‐scale obtained through these measurements, a molecular‐scale simulation system with different numbers of grain boundaries is established. With the Tersoff potential parameters fitted by Kuopanportti, the change rates of the elastic modulus and yield limit of the steel with different concentrations of hydrogen can be calculated.

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