RT info:eu-repo/semantics/article
T1 Effect of electrochemical charging on the hydrogen embrittlement susceptibility of a low-alloyed tempered martensitic steel submitted to high internal pressure
A1 Peral, Luis Borja
A1 Díaz Portugal, Andrés
A1 Colombo, Chiara
A1 Alegre Calderón, Jesús Manuel
A1 Cuesta Segura, Isidoro Iván
K1 Hydrogen embrittlement
K1 Electrochemical permeation
K1 Cathodic hydrogen precharge
K1 High internal pressure
K1 Fracture micromechanisms
K1 Ingeniería mecánica
K1 Mechanical engineering
K1 Materiales
K1 Materials
K1 Resistencia de materiales
K1 Strength of materials
AB The influence of hydrogen on the mechanical behavior of a quenched and tempered 42CrMo4 steel has been evaluated by means of high internal pressure fracture tests carried out on hydrogen precharged notched cylindrical specimens. The notched cylindrical specimens were precharged for 3 h time with 1.2 mA/cm2 in two different aqueous media: 1 M H2SO4 added with 0.25 g/l As2O3 and 3.5% of NaCl solution. Hydraulic fracture tests were performed at different ramps of pressure: 7000, 220, 80, 60 and 30 MPa/h, respectively. Hydrogen damage was more marked when the acid aqueous medium (1 M H2SO4 + 0.25 g/l As2O3) was employed. In this case, a higher hydrogen concentration was introduced, leading to hydrogen decohesion micromechanisms (HEDE) near the notched region, especially when tests were performed at 60 MPa/h. Hydrogen embrittlement susceptibility is discussed in terms of the microstructural singularities and the operative fracture micromechanisms observed in each case.
PB Elsevier
SN 0360-3199
YR 2024
FD 2024-04
LK http://hdl.handle.net/10259/8920
UL http://hdl.handle.net/10259/8920
LA eng
NO 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. This work was also supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union Next Generation EU/PRTR (MR4W.P2 and MR5W.P3).
DS Repositorio Institucional de la Universidad de Burgos
RD 21-may-2024