Hydrogen Existing States and Hydrogen Embrittlement

Abstract

To clarify the function of hydrogen in hydrogen embrittlement of various metals, identify of hydrogen existing states, dynamic behavior of hydrogen during deformation, enhanced lattice defect formation, and process to fracture are important. In the present review, determination of hydrogen trapping sites in metals, interaction between dislocation and hydrogen, evaluation of lattice defects such as vacancies and its clusters enhanced by hydrogen and strain, and their relevance to hydrogen embrittlement associated with plastic deformation are presented.