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- W4200328546 endingPage "142491" @default.
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- W4200328546 abstract "The change of fracture morphology after traditional electrochemical hydrogen charging and the microstructure of the hot-rolled AISI430 ferritic stainless steels (FSSs) specimens annealed at different temperatures (720°C–1060 °C) was characterized by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) technology. We systematically illustrated the effect of annealing temperature on its hydrogen embrittlement sensitivity, hydrogen-induced mechanical property changes, and the transformation of microstructure on the change of hydrogen-induced fracture mode. The experimental results prove that: the hydrogen embrittlement susceptibility of FSSs increases significantly from the α single-phase region to the α+β dual-phase region. Due to the presence of intergranular carbides, the annealed specimens in the α single-phase region still retain high plasticity during the tensile test after hydrogen charging, and the yield strength is significantly improved, which is attributed to the change of the strain field around the intergranular carbide by hydrogen. In the presence of hydrogen, the formation of crack holes of annealed specimens in the α single-phase zone and the formation of quasi-cleavage (QC) + cleavage fracture (C) morphology of annealed specimens in α+β dual-phase zone are the result of the synergistic effect of hydrogen enhanced localized plasticity (HELP) and hydrogen enhanced decohesion (HEDE) mechanisms. When the annealing temperature reaches 940 °C, transgranular secondary cracks were observed in the vicinity of the fracture of the annealed specimen, which mainly propagate towards {001}//ND-oriented ferrite grains, accompanied by the high strain zone of the crack boundary." @default.
- W4200328546 created "2021-12-31" @default.
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- W4200328546 date "2022-01-01" @default.
- W4200328546 modified "2023-10-12" @default.
- W4200328546 title "Effect of hydrogen on the mechanical properties and fracture modes of annealed 430 ferritic stainless steel" @default.
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- W4200328546 doi "https://doi.org/10.1016/j.msea.2021.142491" @default.
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