RT info:eu-repo/semantics/article
T1 Hydraulic fracture behavior in the presence of hydrogen in notched miniature cylindrical specimens of a 42CrMo4 steel
A1 Peral, Luis Borja
A1 Díaz Portugal, Andrés
A1 Arniella, V.
A1 Belzunce, J.
A1 Alegre Calderón, Jesús Manuel
A1 Cuesta Segura, Isidoro Iván
K1 Hydrogen embrittlement
K1 Internal high pressure
K1 Hydrogen cathodic precharge
K1 Numerical modelling
K1 HEDE mechanism
K1 Ingeniería mecánica
K1 Mechanical engineering
K1 Materiales
K1 Materials
K1 Ensayos (Tecnología)
K1 Testing
AB 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.
PB Elsevier
SN 0013-7944
YR 2022
FD 2022-10
LK http://hdl.handle.net/10259/7307
UL http://hdl.handle.net/10259/7307
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. 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.
DS Repositorio Institucional de la Universidad de Burgos
RD 22-dic-2024