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Measurement of hydrogen and embrittlement of high strength steels

AuthorsSánchez-Montero, Javier CSIC ORCID; Lee, Siaw Foon CSIC ORCID ; Martin-Rengel, M. A.; Fullea, J. CSIC ORCID; Andrade Perdrix, Carmen CSIC ORCID ; Ruiz-Hervías, Jesús
KeywordsHydrogen embrittlement
High strength steel
Prestressed concrete structures
Cathodic potential
Hydrogen content
Issue DateJan-2016
PublisherElsevier BV
CitationEngineering Failure Analysis 59: 467-477 (2015)
AbstractHydrogen embrittlement of high strength steel is believed to be one of the main reasons for the cracking of prestressed concrete structures. In this study, hydrogen was generated on the steel surface by applying different fixed cathodic potentials. The steel was immersed in simulated carbonated concrete solutions with and without 0.1. M NaCl. Simultaneously, the steel was subjected to tensile loading at slow strain rate until fracture. Fractographic analysis and the measurement of the concentration of absorbed hydrogen in the iron lattice were performed. Results showed that the hydrogen atom only penetrated into the iron lattice when the steel was loaded above its yield stress. This phenomenon produced quasi-cleavage like fracture, and the strain at fracture was considerably reduced. The presence of chloride ion together with the hydrogen embrittlement did not provoke a remarkable synergic effect in the mechanical properties of high-strength steel.
Publisher version (URL)
Identifiersdoi: 10.1016/j.engfailanal.2015.11.001
issn: 1350-6307
Appears in Collections:(IETCC) Artículos

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