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Effect of the Strain Rate on the Fracture Behaviour of High Pressure Pre-Charged Samples


The aim of this work is to study the effect of the displacement rate on the hydrogen embrittlement of two different structural steels grades used in energetic applications. With this purpose, samples were pre-charged with gaseous hydrogen at 19.5 MPa and 450 °C for 21 h. Then, fracture tests of the pre-charged specimens were performed, using different displacement rates. It is showed that the lower is the displacement rate and the largest is the steel strength, the strongest is the reduction of the fracture toughness due to the presence of internal hydrogen.

Funding source: Know-How Innovative Solutions and Instituto de Desarrollo Económico del Principado de Asturias (IDEPA) for the support received to carry out research project IDE/2016/000283.
Countries: Spain

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