Hydrogen trapping state and desorption behavior in hydrogen charged duplex stainless steels (DSS) alloys have been investigated. The susceptibility of steels to hydrogen fracture mechanism is directly related to the interaction between traps (defects) and hydrogen; therefore, it is being affected the most by the deformation process, and hydrogen induced-phase transition. The effect of strain rates and hydrogen fugacity on hydrogen embrittlement in DSS is discussed in details. The common effect of hydrogen on phase transformation has been shown. The impact of hydrogen fugacity and strain rate on DSS have been demonstrated with thermal desorption spectrometry (TDS), X-ray diffraction (XRD), and microstructural observations.
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