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- W2383445981 abstract "Hydrogen induced delayed fracture behavior of a low-carbon Mn-B type ultra-high strength steel sheet for hot stamping at different treatment conditions was studied using constant load delayed fracture test and hydrogen thermal desorption spectrometry(TDS) analysis.The results show that the steel sheet in the as-quenched condition has the lowest delayed fracture resistance,whereas the delayed fracture resistance of the steel sheet can be significantly improved by tempering treatment.The highest delayed fracture resistance of the steel sheet can be obtained when tempered at 200 ℃ with little strength decrease.At even higher tempering temperatures,such as 400 ℃,the delayed fracture resistance of the steel sheet is reduced owing to comparatively significant strength decrease,however,the resistance is still higher than that of the steel sheet in the as-quenched condition.SEM observation of delayed fracture surface shows that the fracture characteristic at crack initiation area of the steel sheet changes from brittle intergranular failure in the as-quenched condition to ductile transgranular failure in the tempered condition.TDS result shows that the hydrogen diffusion coefficient of steel sheet reduces with increasing tempering temperature.The non-diffusible hydrogen content significantly increases when the steel sheet is applied at critical stress compared with that of non-stress applied steel sheet and the steel sheet tempered at 200 ℃ has highest hydrogen content and the steel sheet in the as-quenched condition has lowest hydrogen content." @default.
- W2383445981 created "2016-06-24" @default.
- W2383445981 creator A5044863234 @default.
- W2383445981 date "2013-01-01" @default.
- W2383445981 modified "2023-09-28" @default.
- W2383445981 title "Hydrogen induced delayed fracture behavior of a low-carbon Mn-B type ultra-high strength steel sheet" @default.
- W2383445981 hasPublicationYear "2013" @default.
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