Abstract
Plastic deformation is an important factor affecting the critical condition of hydrogen-induced delayed cracking (HIDC) of quenching and partitioning (Q&P) steels. The study established a clear relationship between pre-strain, threshold stress, and critical hydrogen concentration of QP1180 steel. Furthermore, the reversible and irreversible hydrogen trap densities were determined, and the distribution characteristics of hydrogen were studied using Hydrogen Microprinting (HMT) and Scanning Kelvin Probe Force Microscopy (SKPFM) tests. The results provide valuable insights into the behavior of Q&P steels under hydrogen exposure, which can facilitate the development of safe and reliable components in various industrial applications.
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