Research on the fatigue properties of S135 drill pipe steel under a variety of conditions

被引：1
作者：
Huang, Bensheng [1 ]
Ju, Chunyan [1 ]
Tang, Jingli [1 ]
Chen, Yongbin [2 ]
Li, Guangwen [1 ]
机构：
[1] Southwest Petr Univ, Sch Mat Sci & Engn, Chengdu 610500, Sichuan, Peoples R China
[2] China Petr Engn Co Ltd Chengdu, Southwest Co, Chengdu 610041, Sichuan, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 10期
关键词：
S135 drill pipe steel; smooth specimens; notched specimens; H2S corrosion; fatigue properties; PITTING CORROSION; FAILURE ANALYSIS; STAINLESS-STEEL; H2S; HYDROGEN; BEHAVIOR; SIMULATION; LIFE;
D O I：
10.1088/2053-1591/ab3ffc
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Through rotating bending fatigue test, the fatigue properties of S135 drill pipe steel were investigated under various conditions (a): the smooth specimens; (b): the notched specimens; (c): the notched specimens with H2S corrosion). The experimental results show that the fatigue life of smooth specimens is about 10(7) cycles at fatigue limit (540 MPa); the fatigue life of notched specimens is about 3 x 10(5) cycles at fatigue limit (320 MPa); and the fatigue life of notched specimens with H2S corrosion is about 5 x 10(4) cycles at fatigue limit (300 MPa). By analyzing the surface of fracture, it can be shown that the propagation direction of fatigue crack in the notched specimens is changed little and the propagation speed is faster than the smooth specimens. The cracks of notched specimens with H2S corrosion occur at the high-speed propagation earlier stage, and the initiation and propagation of crack are caused by hydrogen embrittlement and fatigue stress. Compared with H2S corrosion affect S135 drill pipe steel, the effect of the notch is greater on the fatigue life.
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页数：10
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