2026-09-08T07:53:20Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/73072024-04-12T11:33:44Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

Peral, Luis Borja Díaz Portugal, Andrés Arniella, V. Belzunce, J. Alegre Calderón, Jesús Manuel Cuesta Segura, Isidoro Iván 2023-01-24T12:00:00Z 2023-01-24T12:00:00Z 2022-10 0013-7944 http://hdl.handle.net/10259/7307 10.1016/j.engfracmech.2022.108749 The influence of internal hydrogen on the mechanical behavior of the 42CrMo4 steel grade has been evaluated by means of internal pressure fracture tests performed on hydrogen precharged notched cylindrical specimens. The notched cylindrical specimens were precharged in a 1 M H2SO4 solution + 0.25 g/l As2O3 for 3 h and 1.2 mA/cm2. Thereupon, hydraulic fracture tests were done under different ramps of pressure: 208, 100, 52, 35 and 25 MPa/h, respectively. Hydrogen content introduced into the notched cylindrical specimens (∼1 ppm) was determined by thermal desorption analysis (TDA), using a LECO DH 603 hydrogen analyser. Hydrogen damage was observed as testing time increased until 2 h. The burst pressure is reduced around 28 % while the Notch Mouth Opening Displacement decreased around 50 %. Hydrogen embrittlement susceptibility is discussed through the hydrogen embrittlement micromechanisms. The authors would like to thank the Spanish Government for the financial support received to perform the research projects RTI2018-096070-B-C33 and PID2021-124768OB-C21. L.B. Peral is grateful for his Margarita Salas Postdoctoral contract (Ref.: MU-21-UP2021-030) funded by the University of Oviedo through the Next Generation European Union. application/pdf eng Elsevier Engineering Fracture Mechanics. 2022, V. 274, 108749 https://doi.org/10.1016/j.engfracmech.2022.108749 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096070-B-C33/ES/DESARROLLO Y VALIDACION DE MODELOS DE FRAGILIZACION ASISTIDA POR HIDROGENO PARA SU APLICACION AL DISEÑO DE RECIPIENTES SOLDADOS Y SOMETIDOS A ALTAS PRESIONES/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/PID2021-124768OB-C21/ES/Modelado de efectos y aplicaciones del hidrógeno en aceros de fabricación aditiva/ info:eu-repo/grantAgreement/Universidad de Oviedo//MU-21-UP2021-030/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Hydrogen embrittlement Internal high pressure Hydrogen cathodic precharge Numerical modelling HEDE mechanism Ingeniería mecánica Materiales Ensayos (Tecnología) Mechanical engineering Materials Testing Hydraulic fracture behavior in the presence of hydrogen in notched miniature cylindrical specimens of a 42CrMo4 steel info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Engineering Fracture Mechanics 274 108749