Texture and grain boundary study in high strength Fe-18Ni-Co steel related to hydrogen embrittlement

In this work, slow strain rate tests (SSRT) were performed on fully martensitic ultra-high strength Fe-18Ni-Co steel. The results showed that the LAGBs and CSLs linked to {001}//ND cannot stop the crack initiation and propagation. While in free cracked regions, LAGBs and CSLs linked to {111} and {110} are more effective in preventing crack nucleation. Also, crack favorably propagated along high Taylor factor grains exhibited less resistance against crack propagation.