Effect of hydrogen on microstructure evolution and properties of high-strain pipeline steel under cyclic strain loading

被引：8
作者：
Xu, Kai [1 ,3 ]
Ma, Ying-long [1 ]
Huang, Shu-yu [1 ]
Zhang, Hao-Ran [1 ]
Wang, Gang [2 ]
Qiao, Gui-ying [1 ]
Xiao, Fu-ren [3 ]
Li, Ling-xiao [2 ,4 ]
机构：
[1] Yanshan Univ, Sch Environm & Chem Engn, Hebei Key Lab Heavy Met Deep Remediat Water & Reso, Qinhuangdao 066004, Peoples R China
[2] Zhengzhou Univ, Sch Mech & Power Engn, Zhengzhou 450001, Henan, Peoples R China
[3] Yanshan Univ, Coll Mat Sci & Engn, Key Lab Metastable Mat Sci & Technol, Hebei Key Lab Optimizing Met Prod Technol & Perfor, Qinhuangdao 066004, Peoples R China
[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 234卷
关键词：
Hydrogen; Fatigue; Cyclic strain; Dislocation; Crack propagation; FATIGUE-CRACK GROWTH; DISLOCATION-STRUCTURE EVOLUTION; API 5L X70; LOCALIZED PLASTICITY; SCREW DISLOCATIONS; FRACTURE-TOUGHNESS; SYNERGISTIC ACTION; WELDED-JOINT; BCC IRON; EMBRITTLEMENT;
D O I：
10.1016/j.corsci.2024.112148
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution and the fatigue damage mechanism of hydrogen-charged high-strain pipeline steel during the cyclic strain loading is studied. Hydrogen promotes the formation of dislocation walls and cells, and causes the lattice distortion iron atoms to move to the grain boundary, resulting in grain refinement. The fatigue life is reduced to more than 40 % when the strain amplitude reaches 0.5 % after hydrogen-charged. The main reasons for the reduce are the decrease of the number and the change of propagation mode of secondary cracks, and the increase of cleavage fracture and the decrease of deflection angle in the main cracks.
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页数：17
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