Effect of environmental media on the growth rate of fatigue crack in TC4 titanium alloy: Seawater and air

被引：7
作者：
Ren, J. Q. [1 ]
Li, L. [1 ]
Wang, Q. [2 ]
Xin, C. [3 ]
Gao, Q.
Li, J. C. [1 ]
Xue, H. T. [1 ]
Lu, X. F. [1 ]
Tang, F. L. [1 ]
机构：
[1] Lanzhou Univ Technol, Dept Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[2] Huanghuai Univ, Sch Energy Engn, Zhumadian 463000, Peoples R China
[3] Northwest Inst Nonferrous Met Res, Xian 710049, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 230卷
基金：
中国国家自然科学基金;
关键词：
TC4; alloy; H plus; alpha/beta interphase; alpha colony;
D O I：
10.1016/j.corsci.2024.111941
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fatigue crack growth rate of TC4 alloy in seawater is significantly faster than that in air. In order to analyze the behind reasons, the crack propagation path are investigated by scanning electron microscopy in conjunction with electron backscattering diffraction. The results indicates that the complex ionic environment in seawater can diminish the resistance of the fatigue crack growth. Especially, the damage of the alpha/beta interphase induced by hydrogen embrittlement and Cl- in the seawater accelerate the fatigue crack propagation along the phase interface, although the presence of alpha/beta interphase can reduce the crack propagation rate in air.
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页数：10
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