Investigation into the mechanisms of Corrosion-Induced rolling contact fatigue crack initiation and propagation in pearlitic rails

被引:3
|
作者
Wang, Kai [1 ,2 ]
Bai, Taoshuo [1 ,2 ]
Xu, Jingmang [1 ,2 ]
Zhu, Hui [1 ,2 ]
Qian, Yao [1 ,2 ]
Wang, Xuetong [1 ,2 ]
Chen, Rong [1 ,2 ]
Wang, Ping [1 ,2 ]
机构
[1] Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
[2] Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China
基金
中国国家自然科学基金;
关键词
Corrosion Fatigue; Pearlitic Rail; Rolling Contact Fatigue Crack; Damage Characterization; MICROSTRUCTURE;
D O I
10.1016/j.engfailanal.2024.108614
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Corrosion stands as a pivotal causative agent for the initiation and propagation of rolling contact fatigue (RCF) cracks on rail surfaces. This study aims to scientifically delineate the corrosion fatigue behavior of U75V rails. The study identifies the presence of oxidative corrosion and graphitization on the rail surface. Carbides near the rail surface cause stress concentration, reducing the rail's RCF residence. Oxide corrosion engenders internal oxide inclusions within cracks, expediting RCF crack propagation. Furthermore, grain refinement and discordant deformation between soft and hard grains near the rail surface give rise to sub-surface microporosity and microcracking. These findings advance our comprehension of rail RCF and offer insights for guiding rail maintenance and informing new rail design strategies.
引用
收藏
页数:15
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