Stress corrosion behavior and mechanism of Ti6321 alloy in seawater with different dissolved oxygen concentrations

被引：0
|
作者：
Hao, Fuyao [1 ]
Zhang, Huixia [1 ]
Li, Xiangbo [1 ]
Hou, Jian [1 ]
Li, Wenju [2 ]
Xu, Yali [1 ]
Guo, Weimin [1 ]
机构：
[1] Luoyang Ship Mat Res Inst, Natl Key Lab Marine Corros & Protect, Qingdao, Shandong, Peoples R China
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2025年 / 76卷 / 01期
基金：
国家重点研发计划;
关键词：
dissolved oxygen; SSRT; stress corrosion cracking; Ti6321; alloy; CRACKING; STEEL;
D O I：
10.1002/maco.202414546
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The stress corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo (Ti6321, in wt%) alloy in seawater with different dissolved oxygen (DO) concentrations was investigated using X-ray photoelectron spectroscopy, energy dispersive spectrometer, electrochemical measurements, and other advanced methodologies. The results indicate that when the DO concentration in seawater is insufficient, the passivation film will preferentially form on the alpha-phase surface. Meanwhile, insufficient DO concentration leads to incomplete oxidation of the surface passivation film, resulting in an increase in surface defects. Hydrogen produced by reactions at crack tips is more likely to enter the surface of the titanium alloy through these defects, and under the influence of HEDE and HELP mechanisms, promote crack propagation. The stress corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy in seawater with different dissolved oxygen (DO) concentrations was investigated using different methodologies. Insufficient DO concentration leads to incomplete oxidation of the surface passivation film. Hydrogen produced by reactions at crack tips is more likely to enter the surface of the titanium alloy through these defects, and under the influence of HEDE and HELP mechanisms, promote crack propagation. image
引用
收藏
页码：164 / 174
页数：11
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