Effect of corrosion on the fatigue crack propagation properties of butt weld with G20Mn5QT cast steel and Q355D steel in 3.5-wt% NaCl solution

被引：2
作者：
Han, Qinghua [1 ,2 ,3 ]
Li, Yang [3 ]
Lu, Yan [1 ,2 ,3 ]
Wang, Gexing [3 ]
机构：
[1] Tianjin Univ, State Key Lab Hydraul Engn Simulat & Safety, Tianjin, Peoples R China
[2] Tianjin Univ, Key Lab Coast Civil Struct Safety, China Minist Educ, Tianjin, Peoples R China
[3] Tianjin Univ, Sch Civil Engn, Tianjin, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 10期
基金：
中国国家自然科学基金;
关键词：
butt weld with cast steel and hot rolled steel; corrosion fatigue crack propagation mechanism; corrosion fatigue crack propagation rate model; loading frequency; stress ratio; GROWTH RATE; BEHAVIOR; MODEL;
D O I：
10.1111/ffe.14117
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The corrosion fatigue crack propagation (FCP) of the butt weld with G20Mn5QT cast steel and Q355D steel in 3.5-wt% NaCl solution was investigated experimentally. Considering the influences of stress ratio and loading frequency, the corrosion FCP rate curve was obtained. The results indicated that the corrosion FCP rate in the corrosion environment is three times that in air. Increasing the stress ratio or decreasing the loading frequency will increase the corrosion FCP rate. The fracture morphology of the specimens in the corrosion environment had more corrosion pits and intergranular characteristics due to anodic dissolution than that in air. Anodic dissolution and hydrogen embrittlement jointly promoted the corrosion FCP of butt weld in simulated seawater. The corrosion FCP rate model was established considering the effects of stress ratio and loading frequency.
引用
收藏
页码：4020 / 4035
页数：16
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