2026-04-27T15:22:52Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/77132024-04-12T11:34:32Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

00925njm 22002777a 4500 dc Peral, Luis Borja author Díaz Portugal, Andrés author Arniella, V. author Belzunce, J. author Alegre Calderón, Jesús Manuel author Cuesta Segura, Isidoro Iván author 2023-09 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. 0013-7944 http://hdl.handle.net/10259/7713 10.1016/j.engfracmech.2023.109414 High internal pressure PAGS Hydrogen cathodic precharge Martensitic lath decohesion Hydrogen embrittlement Influence of hydrogen on the hydraulic fracture behavior of a 42CrMo4 steel welds: Effect of the prior austenite grain size