2026-10-22T22:31:53Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/56622022-09-02T22:42:07Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
Repositorio Institucional de la Universidad de Burgos
author
Díaz Portugal, Andrés
author
Cuesta Segura, Isidoro Iván
author
Martínez Pañeda, Emilio
author
Alegre Calderón, Jesús Manuel
2021-03-24T10:01:15Z
2021-03-24T10:01:15Z
2020-09
0360-3199
http://hdl.handle.net/10259/5662
10.1016/j.ijhydene.2020.05.192
Failures attributed to hydrogen embrittlement are a major concern for metals so a better understanding of damage micro-mechanisms and hydrogen diffusion within the metal is needed. Local concentrations depend on transport phenomena including trapping effects, which are usually characterised by a temperature-programmed desorption method often referred to as Thermal Desorption Analysis (TDA). When the hydrogen is released from the specimen during the programmed heating, some desorption peaks are observed that are commonly related to detrapping energies by means of an analytical procedure. The limitations of this approach are revisited here and gaseous hydrogen charging at high temperatures is simulated. This popular procedure enables attaining high concentrations due to the higher solubility of hydrogen at high temperatures. However, the segregation behaviour of hydrogen into traps depends on charging time and temperature. This process and the subsequent cooling alter hydrogen distribution are numerically modelled; it is found that TDA spectra are strongly affected by the charging temperature and the charging time, both for weak and strong traps. However, the influence of ageing time at room temperature after cooling and before desorption is only appreciable for weak traps.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Hydrogen trapping
Thermal desorption
Gaseous charging
Finite Element modelling
Influence of charging conditions on simulated temperature-programmed desorption for hydrogen in metals
info:eu-repo/semantics/article
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