In this paper, the attention is focussed on the mechanical fatigue behaviour of high-strength steels subjected to hydrogen embrittlement. An analytical model is introduced to interpolate experimental fatigue results, from tests carried out on hydrogen charged and not charged specimens, varying temperature and frequency. The aim is to find an useful tool able to describe the fatigue behaviour of the metals and to understand the crack growth mechanisms under these different test and environmental conditions. Good agreement is found between the estimations of the model and the experimental data: in this light, an application to a real case is proposed, to evaluate the residual fatigue life of the cracked pipe in presence or not of a corrosive environment.

A MODEL TO PREDICT THE CRACK GROWTH RATE IN HYDROGEN ENVINROMENT

COLOMBO, CHIARA;SCIUCCATI, AUGUSTO;VERGANI, LAURA MARIA
2012

Abstract

In this paper, the attention is focussed on the mechanical fatigue behaviour of high-strength steels subjected to hydrogen embrittlement. An analytical model is introduced to interpolate experimental fatigue results, from tests carried out on hydrogen charged and not charged specimens, varying temperature and frequency. The aim is to find an useful tool able to describe the fatigue behaviour of the metals and to understand the crack growth mechanisms under these different test and environmental conditions. Good agreement is found between the estimations of the model and the experimental data: in this light, an application to a real case is proposed, to evaluate the residual fatigue life of the cracked pipe in presence or not of a corrosive environment.
Proceedings of the XVI International Colloquium - Mechanical Fatigue of Metals
9788087434055
hydrogen embrittlement; low temperature; crack propagation
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/695525
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