HYDROGEN-INDUCED FAILURE OF OIL-WELL TUBULAR STEEL C90
YU Guanghua; CHENG Yihuan; CHEN Hongxing; NIU Xuejun; QIAO Lijie; CHU Wuyang (University of Science and Technology Beijing; Beijing 100083)(Baoshan Corporation of Iron and Steel; Shanghai 201900)
Cite this article:
YU Guanghua; CHENG Yihuan; CHEN Hongxing; NIU Xuejun; QIAO Lijie; CHU Wuyang (University of Science and Technology Beijing; Beijing 100083)(Baoshan Corporation of Iron and Steel; Shanghai 201900). HYDROGEN-INDUCED FAILURE OF OIL-WELL TUBULAR STEEL C90. Acta Metall Sin, 1996, 32(6): 617-623.
Abstract Hydrogen-induced failure properties of three oil-well tubular steels(C90, SM90 and SM95) have been compared. The threshold diffusible hydrogen contents of steel SM90, SM95 and C90 for hydogen blistering are 1 .76, 4.3, and 8.38×10-6, respectively, and the total hydrogen contents 4.24, 6.35 and 10.22 × 10-6 respectively. The threshold stresses of hydrogen-induced fracture corresponding to SM90, SM95 and C90 in NACE solution are σ_(th) /σ_s = 0.64, 0.80 and 0.85, respectively. The threshold stress intensity of hydrogen- induced fracture for C90 decreases with the increase in the diffusible hydrogen content w_o and the experimental result which is consistant with theoretical analysis is as follows: K_(IH) = 46- 1 2. 5lnw_0.
WU Yichu;CHANG Xiangrong;TIAN Zhongzhuo;XIAO Jimei University of Science and Technology Beijing. HYDROGEN DAMAGE IN HIGH PURITY IRON[J]. 金属学报, 1992, 28(2): 43-46.
