2026-06-21T19:10:15Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/73072024-04-12T11:33:44Zcom_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 2022-10 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. 0013-7944 http://hdl.handle.net/10259/7307 10.1016/j.engfracmech.2022.108749 Hydrogen embrittlement Internal high pressure Hydrogen cathodic precharge Numerical modelling HEDE mechanism Hydraulic fracture behavior in the presence of hydrogen in notched miniature cylindrical specimens of a 42CrMo4 steel