Abstract
This study investigated the hydrogen embrittlement behavior of ultrahigh strength hot-stamped aluminized 22MnB5 steel. Hydrogen was introduced through electrochemical charging under different hydrogen conditions to assess their sensitivity to hydrogen-induced cracking. Then, the hydrogen-charged specimens were subjected to the slow strain-rate tensile tests. The fracture morphologies revealed that the charging current density altered the fracture mechanism translated from ductile (uncharged) to quasi-cleavage (0.001A-2h) and a mixture of intergranular and quasi-cleavage fracture (0.1A-2h). Furthermore, the reversibility of hydrogen embrittlement of aluminized specimen was investigated. At low-current density, the coatings were corroded by electrolyte, resulting in additional hydrogen which facilitated the formation of hydrogen-induced cracking and inhibited the restoring of mechanical properties. However, with high-current density, effective cathodic protection ensured the integrity of the surface coating, effectively prohibiting the hydrogen intrusion and promoting the reversibility of hydrogen embrittlement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
