Failure analysis of U71Mn rail welded joints

被引：0
|
作者：
Ma, Chuanping [1 ]
Nie, Yuan [1 ]
Wang, Lijun [1 ]
Zhu, Yonghui [1 ]
Liu, Yan [1 ]
Chen, Hui [1 ]
机构：
[1] SW Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China
来源：
MATERIALS PROCESSING TECHNOLOGY | 2011年 / 337卷
关键词：
U71Mn rail; oval flaw; fatigue fracture; silicate inclusions;
D O I：
10.4028/www.scientific.net/AMR.337.665
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fracture of U71Mn rail welded butt joints on flash welding was analyzed by using visual observation, metallographic microscope, SEM and EDS from macro to micro.The results show that, the transverse fracture is rail oval flaw and the fracture mechanism of the rail is fatigue-crack propagation. The fatigue cracking is caused by silicate-non-metallic inclusions which are residues in the welded joints after flash welding.
引用
收藏
页码：665 / 669
页数：5
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