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

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...

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Veröffentlicht in:Proceedings 2018-12, Vol.2 (23), p.1417
Hauptverfasser: Guillermo Álvarez Díaz, Tomás Eduardo García Suárez, Cristina. Rodríguez González, Francisco Javier Belzunce Varela
Format: Artikel
Sprache:eng
Schlagworte:
displacement rate
fracture toughness
hydrogen embrittlement
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Zusammenfassung: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.
ISSN:2504-3900
DOI:10.3390/proceedings2231417