期刊
CORROSION SCIENCE
卷 192, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109796
关键词
Twining-induced plasticity steel; Hydrogen-induced crack; Statistical analysis; Heterogeneous deformation; Slip transfer; Grain boundary character
资金
- National Natural Science Foun-dation of China [U1760203, 52071016]
The initiation and propagation of hydrogen-induced cracks in TWIP steel were quantitatively explored, revealing that heterogeneous deformation and grain boundary character play a crucial role in HIC initiation. The slip transfer parameter and residual dislocation on a grain boundary were found to be critical conditions for HIC initiation, which is prone to occur along random grain boundaries.
The initiation and propagation of hydrogen-induced cracks (HICs) in twining-induced plasticity (TWIP) steel were quantificationally explored based on the HIC statistics at a macro level and a micro level by slow strain rate tensile (SSRT) with in-situ hydrogen-charging and electron microanalysis. The heterogeneous deformation and grain boundary character determines a HIC initiation. The slip transfer parameter m ' 0.93 and the minimum residual Burgers vector of residual dislocations on a grain boundary br 0.19 were the critical condition for HIC initiation. Moreover, HICs prone to initiate and propagate along random grain boundaries (RGBs), while the sigma 3 grain boundaries and vice.
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