Hydrogen embrittlement mechanisms
Hydrogen embrittlement of steels: mechanisms
Article REF: M176 V1
Hydrogen embrittlement mechanisms
Hydrogen embrittlement of steels: mechanisms

Authors : Anne-Marie BRASS, Jacques CHÊNE, Lionel COUDREUSE

Publication date: September 10, 2000 | Lire en français

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2. Hydrogen embrittlement mechanisms

Numerous mechanisms have been proposed to interpret the different forms of hydrogen damage in iron and steel. They can be classified into three main families of mechanisms based on phase transformations, decohesion processes or hydrogen-strain interactions.

2.1 Fragilization induced by hydride precipitation

Hydride precipitation associated with hydrogen supersaturation under given temperature and pressure conditions and/or assisted by a stress field can induce high brittleness in certain materials

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