RT info:eu-repo/semantics/article
T1 Influence of hydrogen on the hydraulic fracture behavior of a 42CrMo4 steel welds: Effect of the prior austenite grain size
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 High internal pressure
K1 PAGS
K1 Hydrogen cathodic precharge
K1 Martensitic lath decohesion
K1 Hydrogen embrittlement
K1 Resistencia de materiales
K1 Strength of materials
K1 Ingeniería civil
K1 Civil engineering
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 in a 1 M H2SO4 + 0.25 g/l As2O3 solution for 3 h with 1.2 mA/cm2. Hydraulic fracture tests were performed at different loading rates. Hydrogen embrittlement resistance increased with grain size refinement although the fine grained specimen had a higher hydrogen content than the coarse grained one. Fractographic analysis showed hydrogen enhanced decohesion fracture was less pronounced with decreasing grain size. Hydrogen embrittlement susceptibility is discussed in terms of the prior austenite grain size (PAGS) and the operative fracture mechanisms.
PB Elsevier
SN 0013-7944
YR 2023
FD 2023-09
LK http://hdl.handle.net/10259/7713
UL http://hdl.handle.net/10259/7713
LA eng
NO The authors would like to thank the Spanish Government for the financial support received to perform the research projects TED2021-130413B-I00 and PID2021-124768OB-C21. This work was 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 (MR5W.P3) and PRTR (MR4W.P2). 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 06-jul-2024