The mechanism of hydrogen embrittlement in α-Fe has been extensively studied,which is generally considered to be associated with the characteristics of atomic bonds.Some investigations revealed that the mechanism of hydrogen embrittlement in α-Fe is thatsolute hydrogen decreases the strength of the atomic bonds at the crack tip and there- The mechanism of hydrogen embrittlement in α-Fe has been extensively studied, which is generally considered to be associated with the characteristics of atomic bonds .Some investigations revealed that the mechanism of hydrogen embrittlement in α-Fe is thatsolute hydrogen decreases the strength of the atomic bonds at the crack tip and there-