Effect of hydrogen content on the embrittlement in a Fe-Mn-C twinning-induced plasticity steel

► Effects of Hydrogen content in a Fe-Mn-C ternary TWIP steel were examined. ► The effect of hydrogen was quantitatively evaluated by tensile tests and thermal desorption analyses. ► Intergranular fracture was observed in the hydrogen-charged sample. ► The relationship between the fracture stresses and the diffusible hydrogen content was approximated to power law.