The hydrogen trapping ability of 15 Fe-C-X alloys is compared in this work. Five types of carbides, i.e. Ti, Cr, Mo, W and V based carbides, and their effect on the hydrogen embrittlement susceptibility is considered while three carbon contents are prepared for each carbide former. Two conditions are compared for each alloy to evaluate the hydrogen/material interaction: an as quenched and quenched and tempered condition in which carbides are introduced. Next to the material characterization, also the interaction of hydrogen with the materials is completely elaborated. At first, in-situ tensile tests are done to determine the hydrogen induced ductility loss. To interpret the obtained degrees of hydrogen embrittlement, hot/melt extraction is done to determine the hydrogen content, whereas thermal desorption spectroscopy is performed to assess the hydrogen trapping capacity of the tempered induced precipitates and the different other potentially hydrogen trapping microstructural features. These measurements are done after hydrogen pre-charging till saturation. The tempered induced TiC and V₄C₃ are capable of trapping a significant amount of hydrogen, while the Mo₂C and Cr₂₃C₆ particles only trap a limited amount of hydrogen. The W₂C precipitates, however, are not able to trap hydrogen. The size and coherency of the carbides are considered to be the main factor determining their trapping ability. The degree of hydrogen embrittlement is correlated with the hydrogen present in the alloys. Three amounts of hydrogen were determined by the strength by which they were trapped by combining the different hydrogen characterization techniques, i.e. total, diffusible and mobile hydrogen. It was confirmed that hydrogen trapped by dislocations plays a determinant role. This further confirms the importance of an enhanced dislocation mobility in the presence of hydrogen, as described in the HELP mechanism.

在这项工作中比较了15种Fe-CX合金的氢捕获能力。考虑了五种类型的碳化物，即基于Ti，Cr，Mo，W和V的碳化物，以及它们对氢脆敏感性的影响，同时为每个碳化物形成剂准备了三个碳含量。比较每种合金的两个条件以评估氢/材料的相互作用：淬火，淬火和回火条件下引入了碳化物。除了材料表征之外，还完全阐述了氢与材料的相互作用。首先，进行原位拉伸试验以确定氢引起的延展性损失。为了解释获得的氢脆程度，进行了热/熔萃取以确定氢含量，而热解吸光谱法则是用来评估回火后的析出物的氢捕获能力和其他可能的氢捕获微结构特征。这些测量是在氢气预充电至饱和后进行的。回火诱导的TiC和V₄ C ₃能够捕获大量的氢，而Mo ₂ C和Cr ₂₃ C ₆颗粒仅捕获有限的氢。W ₂但是，C沉淀物不能捕获氢。碳化物的大小和相干性被认为是决定其捕获能力的主要因素。氢脆程度与合金中存在的氢相关。通过结合不同的氢表征技术（即总氢，可扩散氢和移动氢）将其捕获的强度来确定三种氢的量。证实了位错俘获的氢起决定性作用。如HELP机制中所述，这进一步证实了在氢存在下提高位错迁移率的重要性。