Abstract
The effects of atomic hydrogen and flaking on the strength, plasticity, fracture toughness, and hydrogen-induced delayed cracking (HIDC) of a wheel steel were investigated. The results showed that the critical diffusible (C 0 * ) or total (C * ) hydrogen concentration for forming flaking were C 0 * = 1.3 ppm and C * = 3.7 ppm, respectively. There was no effect of flaking on the strength, plasticity, and fracture toughness if the amount of flaking was low, e.g., diffusible hydrogen concentration C 0 ≤ 3.9 ppm. Atomic hydrogen had no effect on the fracture toughness and the mechanical properties extended with normal strain rate. Atomic hydrogen, however, had the effect of reducing the plasticity during slow strain rate tests and induced delayed failure under constant displacement. The threshold stress intensity factor of HIDC, K IH, decreased linearly with the diffusible hydrogen concentration C 0, i.e., K IH(MPam1/2) = K IC − 3.6C 0 (ppm) (0.2 ≤ C 0 ≤ 03.9). The HIDC could be partly attributed to hydrogen-induced additive stress. There was no effect of flaking on HIDC.
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.
